72220313 has 8 divisors (see below), whose sum is σ = 79081920. Its totient is φ = 65408080.

The previous prime is 72220289. The next prime is 72220327. The reversal of 72220313 is 31302227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72220313 - 2⁶ = 72220249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72220333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9245 + ... + 15162.

It is an arithmetic number, because the mean of its divisors is an integer number (9885240).

Almost surely, 2^72220313 is an apocalyptic number.

It is an amenable number.

72220313 is a deficient number, since it is larger than the sum of its proper divisors (6861607).

72220313 is a wasteful number, since it uses less digits than its factorization.

72220313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24687.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 72220313 is about 8498.2535264606. The cubic root of 72220313 is about 416.4406561662.

The spelling of 72220313 in words is "seventy-two million, two hundred twenty thousand, three hundred thirteen".