51216663143453 has 2 divisors, whose sum is σ = 51216663143454. Its totient is φ = 51216663143452.

The previous prime is 51216663143381. The next prime is 51216663143467. The reversal of 51216663143453 is 35434136661215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29574051869209 + 21642611274244 = 5438203^2 + 4652162^2 .

It is a cyclic number.

It is not a de Polignac number, because 51216663143453 - 2¹⁰ = 51216663142429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51216663142453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25608331571726 + 25608331571727.

It is an arithmetic number, because the mean of its divisors is an integer number (25608331571727).

Almost surely, 2^{51216663143453} is an apocalyptic number.

It is an amenable number.

51216663143453 is a deficient number, since it is larger than the sum of its proper divisors (1).

51216663143453 is an equidigital number, since it uses as much as digits as its factorization.

51216663143453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 50.

The spelling of 51216663143453 in words is "fifty-one trillion, two hundred sixteen billion, six hundred sixty-three million, one hundred forty-three thousand, four hundred fifty-three".