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201032131 = 421477511
BaseRepresentation
bin10111111101110…
…00000111000011
3112000021111020111
423332320013003
5402431012011
631540452151
74660513336
oct1376700703
9460244214
10201032131
11a3528463
12573aa057
1332859031
141c9b061d
15129b0121
hexbfb81c3

201032131 has 4 divisors (see below), whose sum is σ = 201510064. Its totient is φ = 200554200.

The previous prime is 201032129. The next prime is 201032159. The reversal of 201032131 is 131230102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131230102 = 265615051.

It is a cyclic number.

It is not a de Polignac number, because 201032131 - 21 = 201032129 is a prime.

It is a super-2 number, since 2×2010321312 = 80827835388802322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201032101) 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, 238335 + ... + 239176.

It is an arithmetic number, because the mean of its divisors is an integer number (50377516).

Almost surely, 2201032131 is an apocalyptic number.

201032131 is a deficient number, since it is larger than the sum of its proper divisors (477933).

201032131 is an equidigital number, since it uses as much as digits as its factorization.

201032131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477932.

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

The square root of 201032131 is about 14178.5800064746. The cubic root of 201032131 is about 585.8078118490.

Adding to 201032131 its reverse (131230102), we get a palindrome (332262233).

The spelling of 201032131 in words is "two hundred one million, thirty-two thousand, one hundred thirty-one".

Divisors: 1 421 477511 201032131