79531555 has 4 divisors (see below), whose sum is σ = 95437872. Its totient is φ = 63625240.

The previous prime is 79531489. The next prime is 79531589. The reversal of 79531555 is 55513597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55513597 = 1171 ⋅47407.

It is not a de Polignac number, because 79531555 - 2¹¹ = 79529507 is a prime.

It is a Duffinian number.

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, 7953151 + ... + 7953160.

It is an arithmetic number, because the mean of its divisors is an integer number (23859468).

Almost surely, 2^79531555 is an apocalyptic number.

79531555 is a deficient number, since it is larger than the sum of its proper divisors (15906317).

79531555 is a wasteful number, since it uses less digits than its factorization.

79531555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15906316.

The product of its digits is 118125, while the sum is 40.

The square root of 79531555 is about 8918.0465910422. The cubic root of 79531555 is about 430.0442626151.

The spelling of 79531555 in words is "seventy-nine million, five hundred thirty-one thousand, five hundred fifty-five".