40725513 has 6 divisors (see below), whose sum is σ = 58825754. Its totient is φ = 27150336.

The previous prime is 40725511. The next prime is 40725521. The reversal of 40725513 is 31552704.

It is a happy number.

40725513 is a `hidden beast` number, since 40 + 72 + 551 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24176889 + 16548624 = 4917^2 + 4068^2 .

It is not a de Polignac number, because 40725513 - 2¹ = 40725511 is a prime.

It is a super-2 number, since 2×40725513² = 3317134818226338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40725511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2262520 + ... + 2262537.

Almost surely, 2^40725513 is an apocalyptic number.

It is an amenable number.

40725513 is a deficient number, since it is larger than the sum of its proper divisors (18100241).

40725513 is a wasteful number, since it uses less digits than its factorization.

40725513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525063 (or 4525060 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 40725513 is about 6381.6544093205. The cubic root of 40725513 is about 344.0504956746.

The spelling of 40725513 in words is "forty million, seven hundred twenty-five thousand, five hundred thirteen".