88221520 has 40 divisors (see below), whose sum is σ = 208602720. Its totient is φ = 34688640.

The previous prime is 88221499. The next prime is 88221589. The reversal of 88221520 is 2512288.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×88221520² = 15566073182220800, which contains 22 as substring.

It is a congruent number.

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, 4626 + ... + 14065.

It is an arithmetic number, because the mean of its divisors is an integer number (5215068).

Almost surely, 2^88221520 is an apocalyptic number.

88221520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

88221520 is an abundant number, since it is smaller than the sum of its proper divisors (120381200).

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

88221520 is a wasteful number, since it uses less digits than its factorization.

88221520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18763 (or 18757 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 88221520 is about 9392.6311542613. The cubic root of 88221520 is about 445.1689296772.

The spelling of 88221520 in words is "eighty-eight million, two hundred twenty-one thousand, five hundred twenty".