88226721 has 12 divisors (see below), whose sum is σ = 139024080. Its totient is φ = 53470680.

The previous prime is 88226717. The next prime is 88226741. The reversal of 88226721 is 12762288.

It is a happy number.

It is not a de Polignac number, because 88226721 - 2² = 88226717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (88226741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445491 + ... + 445688.

It is an arithmetic number, because the mean of its divisors is an integer number (11585340).

Almost surely, 2^88226721 is an apocalyptic number.

It is an amenable number.

88226721 is a deficient number, since it is larger than the sum of its proper divisors (50797359).

88226721 is a wasteful number, since it uses less digits than its factorization.

88226721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891196 (or 891193 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 88226721 is about 9392.9080161577. The cubic root of 88226721 is about 445.1776776490.

It can be divided in two parts, 882267 and 21, that added together give a palindrome (882288).

The spelling of 88226721 in words is "eighty-eight million, two hundred twenty-six thousand, seven hundred twenty-one".