231285977 has 8 divisors (see below), whose sum is σ = 249218760. Its totient is φ = 213373440.

The previous prime is 231285937. The next prime is 231285983. The reversal of 231285977 is 779582132.

231285977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6405961 + 224880016 = 2531^2 + 14996^2 .

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 231285977 - 2⁶ = 231285913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231285937) 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, 25577 + ... + 33417.

It is an arithmetic number, because the mean of its divisors is an integer number (31152345).

Almost surely, 2^231285977 is an apocalyptic number.

It is an amenable number.

231285977 is a deficient number, since it is larger than the sum of its proper divisors (17932783).

231285977 is a wasteful number, since it uses less digits than its factorization.

231285977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10123.

The product of its digits is 211680, while the sum is 44.

The square root of 231285977 is about 15208.0891962140. The cubic root of 231285977 is about 613.8323423660.

The spelling of 231285977 in words is "two hundred thirty-one million, two hundred eighty-five thousand, nine hundred seventy-seven".