231777152 has 32 divisors (see below), whose sum is σ = 467608800. Its totient is φ = 114416640.

The previous prime is 231777151. The next prime is 231777191. The reversal of 231777152 is 251777132.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×231777152² = 107441296378462208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231777151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349 + ... + 21572.

It is an arithmetic number, because the mean of its divisors is an integer number (14612775).

Almost surely, 2^231777152 is an apocalyptic number.

It is an amenable number.

231777152 is an abundant number, since it is smaller than the sum of its proper divisors (235831648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231777152 is an equidigital number, since it uses as much as digits as its factorization.

231777152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23014 (or 23002 counting only the distinct ones).

The product of its digits is 20580, while the sum is 35.

The square root of 231777152 is about 15224.2291102046. The cubic root of 231777152 is about 614.2665608285.

The spelling of 231777152 in words is "two hundred thirty-one million, seven hundred seventy-seven thousand, one hundred fifty-two".