51256125 has 32 divisors (see below), whose sum is σ = 94773120. Its totient is φ = 27334800.

The previous prime is 51256099. The next prime is 51256151. The reversal of 51256125 is 52165215.

It is an interprime number because it is at equal distance from previous prime (51256099) and next prime (51256151).

It is not a de Polignac number, because 51256125 - 2¹² = 51252029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4219 + ... + 10968.

It is an arithmetic number, because the mean of its divisors is an integer number (2961660).

Almost surely, 2^51256125 is an apocalyptic number.

It is an amenable number.

51256125 is a deficient number, since it is larger than the sum of its proper divisors (43516995).

51256125 is a wasteful number, since it uses less digits than its factorization.

51256125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15211 (or 15195 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 51256125 is about 7159.3383074136. The cubic root of 51256125 is about 371.4627390025.

The spelling of 51256125 in words is "fifty-one million, two hundred fifty-six thousand, one hundred twenty-five".