51856225 has 12 divisors (see below), whose sum is σ = 67686640. Its totient is φ = 39301200.

The previous prime is 51856177. The next prime is 51856243. The reversal of 51856225 is 52265815.

It is not a de Polignac number, because 51856225 - 2⁷ = 51856097 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54111 + ... + 55060.

Almost surely, 2^51856225 is an apocalyptic number.

It is an amenable number.

51856225 is a deficient number, since it is larger than the sum of its proper divisors (15830415).

51856225 is a wasteful number, since it uses less digits than its factorization.

51856225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109200 (or 109195 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The square root of 51856225 is about 7201.1266479628. The cubic root of 51856225 is about 372.9067970020.

The spelling of 51856225 in words is "fifty-one million, eight hundred fifty-six thousand, two hundred twenty-five".