79315231 has 4 divisors (see below), whose sum is σ = 79714000. Its totient is φ = 78916464.

The previous prime is 79315193. The next prime is 79315237. The reversal of 79315231 is 13251397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13251397 = 113 ⋅117269.

It is a cyclic number.

It is not a de Polignac number, because 79315231 - 2¹¹ = 79313183 is a prime.

It is a super-2 number, since 2×79315231² = 12581811737166722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79315193 and 79315202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79315237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199086 + ... + 199483.

It is an arithmetic number, because the mean of its divisors is an integer number (19928500).

Almost surely, 2^79315231 is an apocalyptic number.

79315231 is a deficient number, since it is larger than the sum of its proper divisors (398769).

79315231 is a wasteful number, since it uses less digits than its factorization.

79315231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398768.

The product of its digits is 5670, while the sum is 31.

The square root of 79315231 is about 8905.9098917517. The cubic root of 79315231 is about 429.6540050700.

The spelling of 79315231 in words is "seventy-nine million, three hundred fifteen thousand, two hundred thirty-one".