388315225 has 12 divisors (see below), whose sum is σ = 485931820. Its totient is φ = 307800000.

The previous prime is 388315211. The next prime is 388315229. The reversal of 388315225 is 522513883.

It can be written as a sum of positive squares in 6 ways, for example, as 6230016 + 382085209 = 2496^2 + 19547^2 .

It is not a de Polignac number, because 388315225 - 2⁷ = 388315097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388315229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68526 + ... + 73975.

Almost surely, 2^388315225 is an apocalyptic number.

It is an amenable number.

388315225 is a deficient number, since it is larger than the sum of its proper divisors (97616595).

388315225 is a wasteful number, since it uses less digits than its factorization.

388315225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142620 (or 142615 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 388315225 is about 19705.7155414362. The cubic root of 388315225 is about 729.5607697397.

The spelling of 388315225 in words is "three hundred eighty-eight million, three hundred fifteen thousand, two hundred twenty-five".