51645125 has 16 divisors (see below), whose sum is σ = 73661952. Its totient is φ = 35413200.

The previous prime is 51645109. The next prime is 51645131. The reversal of 51645125 is 52154615.

It is a happy number.

It is not a de Polignac number, because 51645125 - 2⁴ = 51645109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28637 + ... + 30386.

It is an arithmetic number, because the mean of its divisors is an integer number (4603872).

Almost surely, 2^51645125 is an apocalyptic number.

It is an amenable number.

51645125 is a deficient number, since it is larger than the sum of its proper divisors (22016827).

51645125 is an equidigital number, since it uses as much as digits as its factorization.

51645125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59045 (or 59035 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 51645125 is about 7186.4542717532. The cubic root of 51645125 is about 372.4000903171.

The spelling of 51645125 in words is "fifty-one million, six hundred forty-five thousand, one hundred twenty-five".