88641531 has 24 divisors (see below), whose sum is σ = 140175360. Its totient is φ = 53530800.

The previous prime is 88641523. The next prime is 88641547. The reversal of 88641531 is 13514688.

88641531 is a `hidden beast` number, since 8 + 8 + 641 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 88641531 - 2³ = 88641523 is a prime.

It is a super-2 number, since 2×88641531² = 15714642036047922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (88641521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29350 + ... + 32228.

It is an arithmetic number, because the mean of its divisors is an integer number (5840640).

Almost surely, 2^88641531 is an apocalyptic number.

88641531 is a deficient number, since it is larger than the sum of its proper divisors (51533829).

88641531 is a wasteful number, since it uses less digits than its factorization.

88641531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3204 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 88641531 is about 9414.9631438471. The cubic root of 88641531 is about 445.8742749913.

It can be divided in two parts, 886415 and 31, that added together give a triangular number (886446 = T₁₃₃₁).

The spelling of 88641531 in words is "eighty-eight million, six hundred forty-one thousand, five hundred thirty-one".