231492010881 has 4 divisors (see below), whose sum is σ = 308656014512. Its totient is φ = 154328007252.

The previous prime is 231492010879. The next prime is 231492010907. The reversal of 231492010881 is 188010294132.

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 not a de Polignac number, because 231492010881 - 2¹ = 231492010879 is a prime.

It is a super-2 number, since 2×231492010881² (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 (231492010831) 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, 38582001811 + ... + 38582001816.

It is an arithmetic number, because the mean of its divisors is an integer number (77164003628).

Almost surely, 2^231492010881 is an apocalyptic number.

It is an amenable number.

231492010881 is a deficient number, since it is larger than the sum of its proper divisors (77164003631).

231492010881 is an equidigital number, since it uses as much as digits as its factorization.

231492010881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77164003630.

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 231492010881 in words is "two hundred thirty-one billion, four hundred ninety-two million, ten thousand, eight hundred eighty-one".