39157225 has 6 divisors (see below), whose sum is σ = 48554990. Its totient is φ = 31325760.

The previous prime is 39157193. The next prime is 39157243. The reversal of 39157225 is 52275193.

It can be written as a sum of positive squares in 3 ways, for example, as 3504384 + 35652841 = 1872^2 + 5971^2 .

It is not a de Polignac number, because 39157225 - 2⁵ = 39157193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 783120 + ... + 783169.

Almost surely, 2^39157225 is an apocalyptic number.

It is an amenable number.

39157225 is a deficient number, since it is larger than the sum of its proper divisors (9397765).

39157225 is a wasteful number, since it uses less digits than its factorization.

39157225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566299 (or 1566294 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The square root of 39157225 is about 6257.5734114751. The cubic root of 39157225 is about 339.5762454348.

The spelling of 39157225 in words is "thirty-nine million, one hundred fifty-seven thousand, two hundred twenty-five".