215040231013 has 4 divisors (see below), whose sum is σ = 215046748908. Its totient is φ = 215033713120.

The previous prime is 215040230971. The next prime is 215040231017. The reversal of 215040231013 is 310132040512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205420152289 + 9620078724 = 453233^2 + 98082^2 .

It is a cyclic number.

It is not a de Polignac number, because 215040231013 - 2²⁹ = 214503360101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215040231017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209206 + ... + 3275527.

It is an arithmetic number, because the mean of its divisors is an integer number (53761687227).

Almost surely, 2^215040231013 is an apocalyptic number.

It is an amenable number.

215040231013 is a deficient number, since it is larger than the sum of its proper divisors (6517895).

215040231013 is an equidigital number, since it uses as much as digits as its factorization.

215040231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6517894.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 215040231013 its reverse (310132040512), we get a palindrome (525172271525).

The spelling of 215040231013 in words is "two hundred fifteen billion, forty million, two hundred thirty-one thousand, thirteen".