51409425 has 12 divisors (see below), whose sum is σ = 84997040. Its totient is φ = 27418320.

The previous prime is 51409409. The next prime is 51409433. The reversal of 51409425 is 52490415.

It is not a de Polignac number, because 51409425 - 2⁴ = 51409409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51409392 and 51409401.

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, 342655 + ... + 342804.

Almost surely, 2^51409425 is an apocalyptic number.

It is an amenable number.

51409425 is a deficient number, since it is larger than the sum of its proper divisors (33587615).

51409425 is a wasteful number, since it uses less digits than its factorization.

51409425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685472 (or 685467 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 51409425 is about 7170.0366107852. The cubic root of 51409425 is about 371.8327016834.

The spelling of 51409425 in words is "fifty-one million, four hundred nine thousand, four hundred twenty-five".