72273915 has 36 divisors (see below), whose sum is σ = 143470704. Its totient is φ = 32970528.

The previous prime is 72273907. The next prime is 72273923. The reversal of 72273915 is 51937227.

It is an interprime number because it is at equal distance from previous prime (72273907) and next prime (72273923).

It is not a de Polignac number, because 72273915 - 2³ = 72273907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72273915.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 150646 + ... + 151124.

Almost surely, 2^72273915 is an apocalyptic number.

72273915 is a deficient number, since it is larger than the sum of its proper divisors (71196789).

72273915 is an equidigital number, since it uses as much as digits as its factorization.

72273915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 494 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 72273915 is about 8501.4066483141. The cubic root of 72273915 is about 416.5436582668.

The spelling of 72273915 in words is "seventy-two million, two hundred seventy-three thousand, nine hundred fifteen".