79220231 has 4 divisors (see below), whose sum is σ = 79515000. Its totient is φ = 78925464.

The previous prime is 79220179. The next prime is 79220243. The reversal of 79220231 is 13202297.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79220231 is a prime.

It is a super-2 number, since 2×79220231² = 12551689999386722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79220231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79220831) 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, 146981 + ... + 147518.

It is an arithmetic number, because the mean of its divisors is an integer number (19878750).

Almost surely, 2^79220231 is an apocalyptic number.

79220231 is a deficient number, since it is larger than the sum of its proper divisors (294769).

79220231 is a wasteful number, since it uses less digits than its factorization.

79220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294768.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 79220231 is about 8900.5747567222. The cubic root of 79220231 is about 429.4823968467.

The spelling of 79220231 in words is "seventy-nine million, two hundred twenty thousand, two hundred thirty-one".