51500925 has 72 divisors (see below), whose sum is σ = 111034560. Its totient is φ = 22291200.

The previous prime is 51500909. The next prime is 51500941. The reversal of 51500925 is 52900515.

It is an interprime number because it is at equal distance from previous prime (51500909) and next prime (51500941).

It is not a de Polignac number, because 51500925 - 2⁴ = 51500909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29065 + ... + 30785.

Almost surely, 2^51500925 is an apocalyptic number.

It is an amenable number.

51500925 is an abundant number, since it is smaller than the sum of its proper divisors (59533635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51500925 is a wasteful number, since it uses less digits than its factorization.

51500925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 51500925 is about 7176.4144947181. The cubic root of 51500925 is about 372.0531705130.

It can be divided in two parts, 51500 and 925, that added together give a palindrome (52425).

The spelling of 51500925 in words is "fifty-one million, five hundred thousand, nine hundred twenty-five".