51512425 has 12 divisors (see below), whose sum is σ = 64021696. Its totient is φ = 41115600.

The previous prime is 51512413. The next prime is 51512437. The reversal of 51512425 is 52421515.

It is an interprime number because it is at equal distance from previous prime (51512413) and next prime (51512437).

It is not a de Polignac number, because 51512425 - 2⁹ = 51511913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51512425.

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, 10060 + ... + 14290.

Almost surely, 2^51512425 is an apocalyptic number.

It is an amenable number.

51512425 is a deficient number, since it is larger than the sum of its proper divisors (12509271).

51512425 is a wasteful number, since it uses less digits than its factorization.

51512425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728 (or 4723 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 51512425 is about 7177.2156857656. The cubic root of 51512425 is about 372.0808612327.

The spelling of 51512425 in words is "fifty-one million, five hundred twelve thousand, four hundred twenty-five".