51225313984969 has 2 divisors, whose sum is σ = 51225313984970. Its totient is φ = 51225313984968.

The previous prime is 51225313984891. The next prime is 51225313984979. The reversal of 51225313984969 is 96948931352215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47051546704569 + 4173767280400 = 6859413^2 + 2042980^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225313984969 - 2¹⁹ = 51225313460681 is a prime.

It is a super-2 number, since 2×51225313984969² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51225313984979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25612656992484 + 25612656992485.

It is an arithmetic number, because the mean of its divisors is an integer number (25612656992485).

Almost surely, 2^{51225313984969} is an apocalyptic number.

It is an amenable number.

51225313984969 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225313984969 is an equidigital number, since it uses as much as digits as its factorization.

51225313984969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125971200, while the sum is 67.

The spelling of 51225313984969 in words is "fifty-one trillion, two hundred twenty-five billion, three hundred thirteen million, nine hundred eighty-four thousand, nine hundred sixty-nine".