51325917525 has 36 divisors (see below), whose sum is σ = 95100447780. Its totient is φ = 26429894400.

The previous prime is 51325917521. The next prime is 51325917581. The reversal of 51325917525 is 52571952315.

51325917525 is a `hidden beast` number, since 5 + 1 + 3 + 2 + 591 + 7 + 52 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 866831364 + 50459086161 = 29442^2 + 224631^2 .

It is not a de Polignac number, because 51325917525 - 2² = 51325917521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51325917521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3926496 + ... + 3939545.

It is an arithmetic number, because the mean of its divisors is an integer number (2641679105).

Almost surely, 2^51325917525 is an apocalyptic number.

It is an amenable number.

51325917525 is a deficient number, since it is larger than the sum of its proper divisors (43774530255).

51325917525 is a wasteful number, since it uses less digits than its factorization.

51325917525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866086 (or 7866078 counting only the distinct ones).

The product of its digits is 472500, while the sum is 45.

The spelling of 51325917525 in words is "fifty-one billion, three hundred twenty-five million, nine hundred seventeen thousand, five hundred twenty-five".