39513813225 has 24 divisors (see below), whose sum is σ = 65345540832. Its totient is φ = 21068860800.

The previous prime is 39513813193. The next prime is 39513813307. The reversal of 39513813225 is 52231831593.

39513813225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39513813225 - 2⁵ = 39513813193 is a prime.

It is a super-2 number, since 2×39513813225² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253269 + ... + 378381.

It is an arithmetic number, because the mean of its divisors is an integer number (2722730868).

Almost surely, 2^39513813225 is an apocalyptic number.

It is an amenable number.

39513813225 is a deficient number, since it is larger than the sum of its proper divisors (25831727607).

39513813225 is a wasteful number, since it uses less digits than its factorization.

39513813225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129337 (or 129332 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The spelling of 39513813225 in words is "thirty-nine billion, five hundred thirteen million, eight hundred thirteen thousand, two hundred twenty-five".