79201521 has 24 divisors (see below), whose sum is σ = 138438144. Its totient is φ = 42595200.

The previous prime is 79201483. The next prime is 79201531. The reversal of 79201521 is 12510297.

It is not a de Polignac number, because 79201521 - 2⁶ = 79201457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79201531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35905 + ... + 38046.

It is an arithmetic number, because the mean of its divisors is an integer number (5768256).

Almost surely, 2^79201521 is an apocalyptic number.

It is an amenable number.

79201521 is a deficient number, since it is larger than the sum of its proper divisors (59236623).

79201521 is a wasteful number, since it uses less digits than its factorization.

79201521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73981 (or 73978 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 79201521 is about 8899.5236389371. The cubic root of 79201521 is about 429.4485828902.

The spelling of 79201521 in words is "seventy-nine million, two hundred one thousand, five hundred twenty-one".