231541231013 has 4 divisors (see below), whose sum is σ = 236925910848. Its totient is φ = 226156551180.

The previous prime is 231541230923. The next prime is 231541231063. The reversal of 231541231013 is 310132145132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231541231013 - 2¹⁰ = 231541229989 is a prime.

It is a super-2 number, since 2×231541231013² (a number of 24 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 (231541231063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2692339853 + ... + 2692339938.

It is an arithmetic number, because the mean of its divisors is an integer number (59231477712).

Almost surely, 2^231541231013 is an apocalyptic number.

It is an amenable number.

231541231013 is a deficient number, since it is larger than the sum of its proper divisors (5384679835).

231541231013 is an equidigital number, since it uses as much as digits as its factorization.

231541231013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5384679834.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 231541231013 its reverse (310132145132), we get a palindrome (541673376145).

The spelling of 231541231013 in words is "two hundred thirty-one billion, five hundred forty-one million, two hundred thirty-one thousand, thirteen".