88221921 has 16 divisors (see below), whose sum is σ = 125855040. Its totient is φ = 54803520.

The previous prime is 88221899. The next prime is 88221923. The reversal of 88221921 is 12912288.

It is not a de Polignac number, because 88221921 - 2²¹ = 86124769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88221923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9210 + ... + 16163.

It is an arithmetic number, because the mean of its divisors is an integer number (7865940).

Almost surely, 2^88221921 is an apocalyptic number.

It is an amenable number.

88221921 is a deficient number, since it is larger than the sum of its proper divisors (37633119).

88221921 is a wasteful number, since it uses less digits than its factorization.

88221921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25456.

The product of its digits is 4608, while the sum is 33.

The square root of 88221921 is about 9392.6525007582. The cubic root of 88221921 is about 445.1696041629.

The spelling of 88221921 in words is "eighty-eight million, two hundred twenty-one thousand, nine hundred twenty-one".