231081027115231 has 4 divisors (see below), whose sum is σ = 231095297558592. Its totient is φ = 231066756671872.

The previous prime is 231081027115199. The next prime is 231081027115261. The reversal of 231081027115231 is 132511720180132.

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 231081027115231 - 2⁵ = 231081027115199 is a prime.

It is a super-2 number, since 2×231081027115231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231081027115261) 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, 7135197391 + ... + 7135229776.

It is an arithmetic number, because the mean of its divisors is an integer number (57773824389648).

Almost surely, 2^{231081027115231} is an apocalyptic number.

231081027115231 is a deficient number, since it is larger than the sum of its proper divisors (14270443361).

231081027115231 is a wasteful number, since it uses less digits than its factorization.

231081027115231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14270443360.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 231081027115231 its reverse (132511720180132), we get a palindrome (363592747295363).

The spelling of 231081027115231 in words is "two hundred thirty-one trillion, eighty-one billion, twenty-seven million, one hundred fifteen thousand, two hundred thirty-one".