215255432125 has 16 divisors (see below), whose sum is σ = 268667633520. Its totient is φ = 172185849600.

The previous prime is 215255432123. The next prime is 215255432167. The reversal of 215255432125 is 521234552512.

It can be written as a sum of positive squares in 8 ways, for example, as 49630037284 + 165625394841 = 222778^2 + 406971^2 .

It is not a de Polignac number, because 215255432125 - 2¹ = 215255432123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215255432123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141561 + ... + 1316689.

It is an arithmetic number, because the mean of its divisors is an integer number (16791727095).

Almost surely, 2^215255432125 is an apocalyptic number.

215255432125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215255432125 is a deficient number, since it is larger than the sum of its proper divisors (53412201395).

215255432125 is an equidigital number, since it uses as much as digits as its factorization.

215255432125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184977 (or 184967 counting only the distinct ones).

The product of its digits is 120000, while the sum is 37.

Adding to 215255432125 its reverse (521234552512), we get a palindrome (736489984637).

The spelling of 215255432125 in words is "two hundred fifteen billion, two hundred fifty-five million, four hundred thirty-two thousand, one hundred twenty-five".