51408125 has 20 divisors (see below), whose sum is σ = 65079168. Its totient is φ = 40590000.

The previous prime is 51408121. The next prime is 51408127. The reversal of 51408125 is 52180415.

It is not a de Polignac number, because 51408125 - 2² = 51408121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51408094 and 51408103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51408121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51380 + ... + 52370.

Almost surely, 2^51408125 is an apocalyptic number.

It is an amenable number.

51408125 is a deficient number, since it is larger than the sum of its proper divisors (13671043).

51408125 is an frugal number, since it uses more digits than its factorization.

51408125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 51408125 is about 7169.9459551659. The cubic root of 51408125 is about 371.8295674553.

The spelling of 51408125 in words is "fifty-one million, four hundred eight thousand, one hundred twenty-five".