215401530253 has 12 divisors (see below), whose sum is σ = 269843676060. Its totient is φ = 170427583872.

The previous prime is 215401530241. The next prime is 215401530269. The reversal of 215401530253 is 352035104512.

215401530253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133778183049 + 81623347204 = 365757^2 + 285698^2 .

It is not a de Polignac number, because 215401530253 - 2¹⁷ = 215401399181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215401534253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169074348 + ... + 169075621.

It is an arithmetic number, because the mean of its divisors is an integer number (22486973005).

Almost surely, 2^215401530253 is an apocalyptic number.

It is an amenable number.

215401530253 is a deficient number, since it is larger than the sum of its proper divisors (54442145807).

215401530253 is a wasteful number, since it uses less digits than its factorization.

215401530253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338149996 (or 338149989 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 215401530253 its reverse (352035104512), we get a palindrome (567436634765).

The spelling of 215401530253 in words is "two hundred fifteen billion, four hundred one million, five hundred thirty thousand, two hundred fifty-three".