215213403325 has 6 divisors (see below), whose sum is σ = 266864620154. Its totient is φ = 172170722640.

The previous prime is 215213403311. The next prime is 215213403341. The reversal of 215213403325 is 523304312512.

It can be written as a sum of positive squares in 3 ways, for example, as 2547624676 + 212665778649 = 50474^2 + 461157^2 .

It is not a de Polignac number, because 215213403325 - 2⁹ = 215213402813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4304268042 + ... + 4304268091.

Almost surely, 2^215213403325 is an apocalyptic number.

215213403325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215213403325 is a deficient number, since it is larger than the sum of its proper divisors (51651216829).

215213403325 is an equidigital number, since it uses as much as digits as its factorization.

215213403325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8608536143 (or 8608536138 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 215213403325 its reverse (523304312512), we get a palindrome (738517715837).

The spelling of 215213403325 in words is "two hundred fifteen billion, two hundred thirteen million, four hundred three thousand, three hundred twenty-five".