84221572 has 12 divisors (see below), whose sum is σ = 148464540. Its totient is φ = 41803136.

The previous prime is 84221567. The next prime is 84221591. The reversal of 84221572 is 27512248.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73685056 + 10536516 = 8584^2 + 3246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76297 + ... + 77392.

It is an arithmetic number, because the mean of its divisors is an integer number (12372045).

Almost surely, 2^84221572 is an apocalyptic number.

It is an amenable number.

84221572 is a deficient number, since it is larger than the sum of its proper divisors (64242968).

84221572 is a wasteful number, since it uses less digits than its factorization.

84221572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153830 (or 153828 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 84221572 is about 9177.2311728538. The cubic root of 84221572 is about 438.3366468672.

The spelling of 84221572 in words is "eighty-four million, two hundred twenty-one thousand, five hundred seventy-two".