231217077 has 16 divisors (see below), whose sum is σ = 379433600. Its totient is φ = 121960512.

The previous prime is 231217073. The next prime is 231217079. The reversal of 231217077 is 770712132.

It is not a de Polignac number, because 231217077 - 2² = 231217073 is a prime.

It is a super-2 number, since 2×231217077² = 106922673392847858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231217073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423202 + ... + 423747.

It is an arithmetic number, because the mean of its divisors is an integer number (23714600).

Almost surely, 2^231217077 is an apocalyptic number.

It is an amenable number.

231217077 is a deficient number, since it is larger than the sum of its proper divisors (148216523).

231217077 is a wasteful number, since it uses less digits than its factorization.

231217077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846972.

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 231217077 is about 15205.8237856421. The cubic root of 231217077 is about 613.7713828426.

The spelling of 231217077 in words is "two hundred thirty-one million, two hundred seventeen thousand, seventy-seven".