79215271 has 4 divisors (see below), whose sum is σ = 80513944. Its totient is φ = 77916600.

The previous prime is 79215263. The next prime is 79215299. The reversal of 79215271 is 17251297.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79215271 - 2³ = 79215263 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 (79215221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649245 + ... + 649366.

It is an arithmetic number, because the mean of its divisors is an integer number (20128486).

Almost surely, 2^79215271 is an apocalyptic number.

79215271 is a deficient number, since it is larger than the sum of its proper divisors (1298673).

79215271 is a wasteful number, since it uses less digits than its factorization.

79215271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298672.

The product of its digits is 8820, while the sum is 34.

The square root of 79215271 is about 8900.2961186693. The cubic root of 79215271 is about 429.4734333235.

The spelling of 79215271 in words is "seventy-nine million, two hundred fifteen thousand, two hundred seventy-one".