51625390 has 32 divisors (see below), whose sum is σ = 94556160. Its totient is φ = 20292000.

The previous prime is 51625297. The next prime is 51625391. The reversal of 51625390 is 9352615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51625391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270195 + ... + 270385.

It is an arithmetic number, because the mean of its divisors is an integer number (2954880).

Almost surely, 2^51625390 is an apocalyptic number.

51625390 is a deficient number, since it is larger than the sum of its proper divisors (42930770).

51625390 is a wasteful number, since it uses less digits than its factorization.

51625390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 51625390 is about 7185.0810712197. The cubic root of 51625390 is about 372.3526495560.

The spelling of 51625390 in words is "fifty-one million, six hundred twenty-five thousand, three hundred ninety".