51351155444425 has 24 divisors (see below), whose sum is σ = 63924028165080. Its totient is φ = 40920640857600.

The previous prime is 51351155444417. The next prime is 51351155444437. The reversal of 51351155444425 is 52444455115315.

It can be written as a sum of positive squares in 12 ways, for example, as 2352723431881 + 48998432012544 = 1533859^2 + 6999888^2 .

It is not a de Polignac number, because 51351155444425 - 2³ = 51351155444417 is a prime.

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, 19179319 + ... + 21692131.

It is an arithmetic number, because the mean of its divisors is an integer number (2663501173545).

Almost surely, 2^{51351155444425} is an apocalyptic number.

It is an amenable number.

51351155444425 is a deficient number, since it is larger than the sum of its proper divisors (12572872720655).

51351155444425 is a wasteful number, since it uses less digits than its factorization.

51351155444425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516013 (or 2516008 counting only the distinct ones).

The product of its digits is 4800000, while the sum is 49.

The spelling of 51351155444425 in words is "fifty-one trillion, three hundred fifty-one billion, one hundred fifty-five million, four hundred forty-four thousand, four hundred twenty-five".