51258725 has 24 divisors (see below), whose sum is σ = 73536960. Its totient is φ = 34715520.

The previous prime is 51258703. The next prime is 51258731. The reversal of 51258725 is 52785215.

It is not a de Polignac number, because 51258725 - 2⁶ = 51258661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12761 + ... + 16289.

It is an arithmetic number, because the mean of its divisors is an integer number (3064040).

Almost surely, 2^51258725 is an apocalyptic number.

It is an amenable number.

51258725 is a deficient number, since it is larger than the sum of its proper divisors (22278235).

51258725 is a wasteful number, since it uses less digits than its factorization.

51258725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3624 counting only the distinct ones).

The product of its digits is 28000, while the sum is 35.

The square root of 51258725 is about 7159.5198861376. The cubic root of 51258725 is about 371.4690197920.

The spelling of 51258725 in words is "fifty-one million, two hundred fifty-eight thousand, seven hundred twenty-five".