51494725 has 12 divisors (see below), whose sum is σ = 63944320. Its totient is φ = 41137200.

The previous prime is 51494719. The next prime is 51494741. The reversal of 51494725 is 52749415.

It is a de Polignac number, because none of the positive numbers 2^k-51494725 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 28396 + ... + 30154.

Almost surely, 2^51494725 is an apocalyptic number.

It is an amenable number.

51494725 is a deficient number, since it is larger than the sum of its proper divisors (12449595).

51494725 is a wasteful number, since it uses less digits than its factorization.

51494725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2935 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 51494725 is about 7175.9825111270. The cubic root of 51494725 is about 372.0382398929.

The spelling of 51494725 in words is "fifty-one million, four hundred ninety-four thousand, seven hundred twenty-five".