51202166601253 has 2 divisors, whose sum is σ = 51202166601254. Its totient is φ = 51202166601252.

The previous prime is 51202166601251. The next prime is 51202166601319. The reversal of 51202166601253 is 35210666120215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46712946387969 + 4489220213284 = 6834687^2 + 2118778^2 .

It is a cyclic number.

It is not a de Polignac number, because 51202166601253 - 2¹ = 51202166601251 is a prime.

Together with 51202166601251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51202166601251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25601083300626 + 25601083300627.

It is an arithmetic number, because the mean of its divisors is an integer number (25601083300627).

Almost surely, 2^{51202166601253} is an apocalyptic number.

It is an amenable number.

51202166601253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51202166601253 is an equidigital number, since it uses as much as digits as its factorization.

51202166601253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 51202166601253 in words is "fifty-one trillion, two hundred two billion, one hundred sixty-six million, six hundred one thousand, two hundred fifty-three".