51102256369 has 2 divisors, whose sum is σ = 51102256370. Its totient is φ = 51102256368.

The previous prime is 51102256363. The next prime is 51102256421. The reversal of 51102256369 is 96365220115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50991059344 + 111197025 = 225812^2 + 10545^2 .

It is a cyclic number.

It is not a de Polignac number, because 51102256369 - 2²¹ = 51100159217 is a prime.

It is a super-2 number, since 2×51102256369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51102256363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551128184 + 25551128185.

It is an arithmetic number, because the mean of its divisors is an integer number (25551128185).

Almost surely, 2^51102256369 is an apocalyptic number.

It is an amenable number.

51102256369 is a deficient number, since it is larger than the sum of its proper divisors (1).

51102256369 is an equidigital number, since it uses as much as digits as its factorization.

51102256369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 51102256369 in words is "fifty-one billion, one hundred two million, two hundred fifty-six thousand, three hundred sixty-nine".