72231265 has 4 divisors (see below), whose sum is σ = 86677524. Its totient is φ = 57785008.

The previous prime is 72231253. The next prime is 72231277. The reversal of 72231265 is 56213227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56213227 = 7 ⋅8030461.

It is an interprime number because it is at equal distance from previous prime (72231253) and next prime (72231277).

It can be written as a sum of positive squares in 2 ways, for example, as 21977344 + 50253921 = 4688^2 + 7089^2 .

It is a cyclic number.

It is not a de Polignac number, because 72231265 - 2⁵ = 72231233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7223122 + ... + 7223131.

It is an arithmetic number, because the mean of its divisors is an integer number (21669381).

Almost surely, 2^72231265 is an apocalyptic number.

It is an amenable number.

72231265 is a deficient number, since it is larger than the sum of its proper divisors (14446259).

72231265 is a wasteful number, since it uses less digits than its factorization.

72231265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14446258.

The product of its digits is 5040, while the sum is 28.

The square root of 72231265 is about 8498.8978697241. The cubic root of 72231265 is about 416.4617057728.

The spelling of 72231265 in words is "seventy-two million, two hundred thirty-one thousand, two hundred sixty-five".