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211013023 = 1316231771
BaseRepresentation
bin11001001001111…
…00110110011111
3112201001120110011
430210330312133
5413004404043
632534424051
75141403214
oct1444746637
9481046404
10211013023
11a9125231
125a802027
1334941ca0
142004bb0b
15137d259d
hexc93cd9f

211013023 has 4 divisors (see below), whose sum is σ = 227244808. Its totient is φ = 194781240.

The previous prime is 211013021. The next prime is 211013041. The reversal of 211013023 is 320310112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211013023 - 21 = 211013021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16231771 = 211013023 / (2 + 1 + 1 + 0 + 1 + 3 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211012994 and 211013012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211013021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8115873 + ... + 8115898.

It is an arithmetic number, because the mean of its divisors is an integer number (56811202).

Almost surely, 2211013023 is an apocalyptic number.

211013023 is a deficient number, since it is larger than the sum of its proper divisors (16231785).

211013023 is a wasteful number, since it uses less digits than its factorization.

211013023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16231784.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 211013023 is about 14526.2873095640. The cubic root of 211013023 is about 595.3464291457.

Adding to 211013023 its reverse (320310112), we get a palindrome (531323135).

The spelling of 211013023 in words is "two hundred eleven million, thirteen thousand, twenty-three".

Divisors: 1 13 16231771 211013023