72541313 has 4 divisors (see below), whose sum is σ = 78121428. Its totient is φ = 66961200.

The previous prime is 72541309. The next prime is 72541393. The reversal of 72541313 is 31314527.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43467649 + 29073664 = 6593^2 + 5392^2 .

It is a cyclic number.

It is not a de Polignac number, because 72541313 - 2² = 72541309 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 (72541303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2790038 + ... + 2790063.

It is an arithmetic number, because the mean of its divisors is an integer number (19530357).

Almost surely, 2^72541313 is an apocalyptic number.

It is an amenable number.

72541313 is a deficient number, since it is larger than the sum of its proper divisors (5580115).

72541313 is a wasteful number, since it uses less digits than its factorization.

72541313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580114.

The product of its digits is 2520, while the sum is 26.

The square root of 72541313 is about 8517.1188203523. The cubic root of 72541313 is about 417.0567334588.

The spelling of 72541313 in words is "seventy-two million, five hundred forty-one thousand, three hundred thirteen".