79521822 has 24 divisors (see below), whose sum is σ = 173882280. Its totient is φ = 26263440.

The previous prime is 79521817. The next prime is 79521823. The reversal of 79521822 is 22812597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79521823) 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, 18304 + ... + 22227.

It is an arithmetic number, because the mean of its divisors is an integer number (7245095).

Almost surely, 2^79521822 is an apocalyptic number.

79521822 is an abundant number, since it is smaller than the sum of its proper divisors (94360458).

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

79521822 is a wasteful number, since it uses less digits than its factorization.

79521822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40648 (or 40645 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 79521822 is about 8917.5008830950. The cubic root of 79521822 is about 430.0267190897.

The spelling of 79521822 in words is "seventy-nine million, five hundred twenty-one thousand, eight hundred twenty-two".