72220265 has 8 divisors (see below), whose sum is σ = 93330888. Its totient is φ = 53331840.

The previous prime is 72220261. The next prime is 72220289. The reversal of 72220265 is 56202227.

It can be written as a sum of positive squares in 4 ways, for example, as 3396649 + 68823616 = 1843^2 + 8296^2 .

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

It is not a de Polignac number, because 72220265 - 2² = 72220261 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 (72220261) 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, 555476 + ... + 555605.

It is an arithmetic number, because the mean of its divisors is an integer number (11666361).

Almost surely, 2^72220265 is an apocalyptic number.

It is an amenable number.

72220265 is a deficient number, since it is larger than the sum of its proper divisors (21110623).

72220265 is a wasteful number, since it uses less digits than its factorization.

72220265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111099.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 72220265 is about 8498.2507023505. The cubic root of 72220265 is about 416.4405639061.

The spelling of 72220265 in words is "seventy-two million, two hundred twenty thousand, two hundred sixty-five".