88218531 has 8 divisors (see below), whose sum is σ = 130694160. Its totient is φ = 58812336.

The previous prime is 88218527. The next prime is 88218541. The reversal of 88218531 is 13581288.

It is not a de Polignac number, because 88218531 - 2² = 88218527 is a prime.

It is a super-2 number, since 2×88218531² = 15565018423595922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (88218521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633650 + ... + 1633703.

It is an arithmetic number, because the mean of its divisors is an integer number (16336770).

Almost surely, 2^88218531 is an apocalyptic number.

88218531 is a deficient number, since it is larger than the sum of its proper divisors (42475629).

88218531 is a wasteful number, since it uses less digits than its factorization.

88218531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267362 (or 3267356 counting only the distinct ones).

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

The square root of 88218531 is about 9392.4720388192. The cubic root of 88218531 is about 445.1639020869.

The spelling of 88218531 in words is "eighty-eight million, two hundred eighteen thousand, five hundred thirty-one".