88821531 has 24 divisors (see below), whose sum is σ = 131907776. Its totient is φ = 57561840.

The previous prime is 88821529. The next prime is 88821563. The reversal of 88821531 is 13512888.

It is not a de Polignac number, because 88821531 - 2¹ = 88821529 is a prime.

It is a super-2 number, since 2×88821531² = 15778528738367922, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88821511) 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, 109116 + ... + 109926.

Almost surely, 2^88821531 is an apocalyptic number.

88821531 is a deficient number, since it is larger than the sum of its proper divisors (43086245).

88821531 is a wasteful number, since it uses less digits than its factorization.

88821531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143 (or 1140 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 88821531 is about 9424.5175473337. The cubic root of 88821531 is about 446.1758759260.

The spelling of 88821531 in words is "eighty-eight million, eight hundred twenty-one thousand, five hundred thirty-one".