231131013131 has 8 divisors (see below), whose sum is σ = 231410088000. Its totient is φ = 230852063560.

The previous prime is 231131013121. The next prime is 231131013137. The reversal of 231131013131 is 131310131132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231131013131 - 2²² = 231126818827 is a prime.

It is a super-2 number, since 2×231131013131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231131013137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3963020 + ... + 4020918.

It is an arithmetic number, because the mean of its divisors is an integer number (28926261000).

Almost surely, 2^231131013131 is an apocalyptic number.

231131013131 is a deficient number, since it is larger than the sum of its proper divisors (279074869).

231131013131 is a wasteful number, since it uses less digits than its factorization.

231131013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62649.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 231131013131 its reverse (131310131132), we get a palindrome (362441144263).

The spelling of 231131013131 in words is "two hundred thirty-one billion, one hundred thirty-one million, thirteen thousand, one hundred thirty-one".