79517551 has 16 divisors (see below), whose sum is σ = 87103296. Its totient is φ = 72285696.

The previous prime is 79517539. The next prime is 79517579. The reversal of 79517551 is 15571597.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79517551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79517521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104665 + ... + 105421.

It is an arithmetic number, because the mean of its divisors is an integer number (5443956).

Almost surely, 2^79517551 is an apocalyptic number.

79517551 is a deficient number, since it is larger than the sum of its proper divisors (7585745).

79517551 is a wasteful number, since it uses less digits than its factorization.

79517551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its digits is 55125, while the sum is 40.

The square root of 79517551 is about 8917.2614069567. The cubic root of 79517551 is about 430.0190202511.

The spelling of 79517551 in words is "seventy-nine million, five hundred seventeen thousand, five hundred fifty-one".