231542808 has 32 divisors (see below), whose sum is σ = 661551360. Its totient is φ = 66155040.

The previous prime is 231542807. The next prime is 231542809. The reversal of 231542808 is 808245132.

It is an interprime number because it is at equal distance from previous prime (231542807) and next prime (231542809).

It is a super-2 number, since 2×231542808² = 107224143873049728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231542807) 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 7 ways as a sum of consecutive naturals, for example, 688948 + ... + 689283.

It is an arithmetic number, because the mean of its divisors is an integer number (20673480).

Almost surely, 2^231542808 is an apocalyptic number.

231542808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231542808 is an abundant number, since it is smaller than the sum of its proper divisors (430008552).

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

231542808 is a wasteful number, since it uses less digits than its factorization.

231542808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378247 (or 1378243 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 231542808 is about 15216.5307478413. The cubic root of 231542808 is about 614.0594679039.

The spelling of 231542808 in words is "two hundred thirty-one million, five hundred forty-two thousand, eight hundred eight".