215541472253 has 2 divisors, whose sum is σ = 215541472254. Its totient is φ = 215541472252.

The previous prime is 215541472231. The next prime is 215541472291. The reversal of 215541472253 is 352274145512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214111649284 + 1429822969 = 462722^2 + 37813^2 .

It is a cyclic number.

It is not a de Polignac number, because 215541472253 - 2²⁴ = 215524695037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215541472253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215541402253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107770736126 + 107770736127.

It is an arithmetic number, because the mean of its divisors is an integer number (107770736127).

Almost surely, 2^215541472253 is an apocalyptic number.

It is an amenable number.

215541472253 is a deficient number, since it is larger than the sum of its proper divisors (1).

215541472253 is an equidigital number, since it uses as much as digits as its factorization.

215541472253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 41.

The spelling of 215541472253 in words is "two hundred fifteen billion, five hundred forty-one million, four hundred seventy-two thousand, two hundred fifty-three".