51513431043469 has 2 divisors, whose sum is σ = 51513431043470. Its totient is φ = 51513431043468.

The previous prime is 51513431043407. The next prime is 51513431043511. The reversal of 51513431043469 is 96434013431515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50921782402500 + 591648640969 = 7135950^2 + 769187^2 .

It is a cyclic number.

It is not a de Polignac number, because 51513431043469 - 2²⁹ = 51512894172557 is a prime.

It is a super-2 number, since 2×51513431043469² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51513431047469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756715521734 + 25756715521735.

It is an arithmetic number, because the mean of its divisors is an integer number (25756715521735).

Almost surely, 2^{51513431043469} is an apocalyptic number.

It is an amenable number.

51513431043469 is a deficient number, since it is larger than the sum of its proper divisors (1).

51513431043469 is an equidigital number, since it uses as much as digits as its factorization.

51513431043469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 51513431043469 in words is "fifty-one trillion, five hundred thirteen billion, four hundred thirty-one million, forty-three thousand, four hundred sixty-nine".