207138825 has 36 divisors (see below), whose sum is σ = 371999628. Its totient is φ = 110179200.

The previous prime is 207138809. The next prime is 207138853. The reversal of 207138825 is 528831702.

It can be written as a sum of positive squares in 6 ways, for example, as 56070144 + 151068681 = 7488^2 + 12291^2 .

It is not a de Polignac number, because 207138825 - 2⁴ = 207138809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 207138825.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 102727 + ... + 104723.

It is an arithmetic number, because the mean of its divisors is an integer number (10333323).

Almost surely, 2^207138825 is an apocalyptic number.

207138825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

207138825 is a deficient number, since it is larger than the sum of its proper divisors (164860803).

207138825 is a wasteful number, since it uses less digits than its factorization.

207138825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 207138825 is about 14392.3182635738. The cubic root of 207138825 is about 591.6803814406.

The spelling of 207138825 in words is "two hundred seven million, one hundred thirty-eight thousand, eight hundred twenty-five".