39513625 has 8 divisors (see below), whose sum is σ = 49313160. Its totient is φ = 31610800.

The previous prime is 39513619. The next prime is 39513641. The reversal of 39513625 is 52631593.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112896 + 39400729 = 336^2 + 6277^2 .

It is not a de Polignac number, because 39513625 - 2⁷ = 39513497 is a prime.

It is a super-2 number, since 2×39513625² = 3122653121281250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157930 + ... + 158179.

It is an arithmetic number, because the mean of its divisors is an integer number (6164145).

Almost surely, 2^39513625 is an apocalyptic number.

It is an amenable number.

39513625 is a deficient number, since it is larger than the sum of its proper divisors (9799535).

39513625 is an equidigital number, since it uses as much as digits as its factorization.

39513625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316124 (or 316114 counting only the distinct ones).

The product of its digits is 24300, while the sum is 34.

The square root of 39513625 is about 6285.9863983308. The cubic root of 39513625 is about 340.6033835846.

The spelling of 39513625 in words is "thirty-nine million, five hundred thirteen thousand, six hundred twenty-five".