231542660 has 24 divisors (see below), whose sum is σ = 486741696. Its totient is φ = 92521440.

The previous prime is 231542639. The next prime is 231542677. The reversal of 231542660 is 66245132.

231542660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231542660² = 107224006799751200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15815 + ... + 26705.

It is an arithmetic number, because the mean of its divisors is an integer number (20280904).

Almost surely, 2^231542660 is an apocalyptic number.

231542660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231542660 is an abundant number, since it is smaller than the sum of its proper divisors (255199036).

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

231542660 is a wasteful number, since it uses less digits than its factorization.

231542660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11963 (or 11961 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 231542660 is about 15216.5258847084. The cubic root of 231542660 is about 614.0593370702.

Adding to 231542660 its reverse (66245132), we get a palindrome (297787792).

The spelling of 231542660 in words is "two hundred thirty-one million, five hundred forty-two thousand, six hundred sixty".