215546373253 has 2 divisors, whose sum is σ = 215546373254. Its totient is φ = 215546373252.

The previous prime is 215546373247. The next prime is 215546373271. The reversal of 215546373253 is 352373645512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211174254369 + 4372118884 = 459537^2 + 66122^2 .

It is a cyclic number.

It is not a de Polignac number, because 215546373253 - 2²⁵ = 215512818821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215546373233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107773186626 + 107773186627.

It is an arithmetic number, because the mean of its divisors is an integer number (107773186627).

Almost surely, 2^215546373253 is an apocalyptic number.

It is an amenable number.

215546373253 is a deficient number, since it is larger than the sum of its proper divisors (1).

215546373253 is an equidigital number, since it uses as much as digits as its factorization.

215546373253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268000, while the sum is 46.

The spelling of 215546373253 in words is "two hundred fifteen billion, five hundred forty-six million, three hundred seventy-three thousand, two hundred fifty-three".