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230020111 = 479480209
BaseRepresentation
bin11011011010111…
…01010000001111
3121000211020021101
431231131100033
5432341120421
634454043531
75462065366
oct1555352017
9530736241
10230020111
11108927572
12650495a7
1338868499
14227987dd
15152d9191
hexdb5d40f

230020111 has 4 divisors (see below), whose sum is σ = 230500800. Its totient is φ = 229539424.

The previous prime is 230020103. The next prime is 230020139. The reversal of 230020111 is 111020032.

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 230020111 - 23 = 230020103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230020151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239626 + ... + 240583.

It is an arithmetic number, because the mean of its divisors is an integer number (57625200).

Almost surely, 2230020111 is an apocalyptic number.

230020111 is a deficient number, since it is larger than the sum of its proper divisors (480689).

230020111 is an equidigital number, since it uses as much as digits as its factorization.

230020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480688.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 230020111 is about 15166.4139136448. The cubic root of 230020111 is about 612.7104247708.

Adding to 230020111 its reverse (111020032), we get a palindrome (341040143).

The spelling of 230020111 in words is "two hundred thirty million, twenty thousand, one hundred eleven".

Divisors: 1 479 480209 230020111