231311552 has 28 divisors (see below), whose sum is σ = 478968816. Its totient is φ = 110626560.

The previous prime is 231311551. The next prime is 231311579. The reversal of 231311552 is 255113132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (231311551) 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, 77099 + ... + 80042.

Almost surely, 2^231311552 is an apocalyptic number.

It is an amenable number.

231311552 is an abundant number, since it is smaller than the sum of its proper divisors (247657264).

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

231311552 is a wasteful number, since it uses less digits than its factorization.

231311552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157176 (or 157166 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 231311552 is about 15208.9300083865. The cubic root of 231311552 is about 613.8549668584.

Adding to 231311552 its reverse (255113132), we get a palindrome (486424684).

The spelling of 231311552 in words is "two hundred thirty-one million, three hundred eleven thousand, five hundred fifty-two".