51299425 has 12 divisors (see below), whose sum is σ = 63726700. Its totient is φ = 40965120.

The previous prime is 51299383. The next prime is 51299429. The reversal of 51299425 is 52499215.

It can be written as a sum of positive squares in 6 ways, for example, as 9928801 + 41370624 = 3151^2 + 6432^2 .

It is not a de Polignac number, because 51299425 - 2¹¹ = 51297377 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 not an unprimeable number, because it can be changed into a prime (51299429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15301 + ... + 18349.

Almost surely, 2^51299425 is an apocalyptic number.

It is an amenable number.

51299425 is a deficient number, since it is larger than the sum of its proper divisors (12427275).

51299425 is a wasteful number, since it uses less digits than its factorization.

51299425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3727 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 51299425 is about 7162.3616915093. The cubic root of 51299425 is about 371.5673106317.

The spelling of 51299425 in words is "fifty-one million, two hundred ninety-nine thousand, four hundred twenty-five".