88972221 has 32 divisors (see below), whose sum is σ = 131241600. Its totient is φ = 53280000.

The previous prime is 88972189. The next prime is 88972241. The reversal of 88972221 is 12227988.

It is not a de Polignac number, because 88972221 - 2⁵ = 88972189 is a prime.

It is a super-2 number, since 2×88972221² = 15832112219345682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 88972221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88972241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354346 + ... + 354596.

It is an arithmetic number, because the mean of its divisors is an integer number (4101300).

Almost surely, 2^88972221 is an apocalyptic number.

It is an amenable number.

88972221 is a deficient number, since it is larger than the sum of its proper divisors (42269379).

88972221 is a wasteful number, since it uses less digits than its factorization.

88972221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its digits is 32256, while the sum is 39.

The square root of 88972221 is about 9432.5087330996. The cubic root of 88972221 is about 446.4280529816.

The spelling of 88972221 in words is "eighty-eight million, nine hundred seventy-two thousand, two hundred twenty-one".