231377881 has 8 divisors (see below), whose sum is σ = 268914240. Its totient is φ = 194962128.

The previous prime is 231377873. The next prime is 231377891. The reversal of 231377881 is 188773132.

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 231377881 - 2³ = 231377873 is a prime.

It is a super-2 number, since 2×231377881² = 107071447632100322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231377891) 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, 279706 + ... + 280531.

It is an arithmetic number, because the mean of its divisors is an integer number (33614280).

Almost surely, 2^231377881 is an apocalyptic number.

It is an amenable number.

231377881 is a deficient number, since it is larger than the sum of its proper divisors (37536359).

231377881 is an equidigital number, since it uses as much as digits as its factorization.

231377881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560303.

The product of its digits is 56448, while the sum is 40.

The square root of 231377881 is about 15211.1104459865. The cubic root of 231377881 is about 613.9136359198.

The spelling of 231377881 in words is "two hundred thirty-one million, three hundred seventy-seven thousand, eight hundred eighty-one".