51242925 has 24 divisors (see below), whose sum is σ = 86530176. Its totient is φ = 26746240.

The previous prime is 51242921. The next prime is 51242927. The reversal of 51242925 is 52924215.

It is not a de Polignac number, because 51242925 - 2² = 51242921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51242892 and 51242901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3744 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (3605424).

Almost surely, 2^51242925 is an apocalyptic number.

It is an amenable number.

51242925 is a deficient number, since it is larger than the sum of its proper divisors (35287251).

51242925 is a wasteful number, since it uses less digits than its factorization.

51242925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14597 (or 14592 counting only the distinct ones).

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

The square root of 51242925 is about 7158.4163751489. The cubic root of 51242925 is about 371.4308486406.

The spelling of 51242925 in words is "fifty-one million, two hundred forty-two thousand, nine hundred twenty-five".