215311323135 has 32 divisors (see below), whose sum is σ = 351056125440. Its totient is φ = 112647420288.

The previous prime is 215311323127. The next prime is 215311323151. The reversal of 215311323135 is 531323113512.

It is not a de Polignac number, because 215311323135 - 2³ = 215311323127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5710776 + ... + 5748354.

It is an arithmetic number, because the mean of its divisors is an integer number (10970503920).

Almost surely, 2^215311323135 is an apocalyptic number.

215311323135 is a deficient number, since it is larger than the sum of its proper divisors (135744802305).

215311323135 is a wasteful number, since it uses less digits than its factorization.

215311323135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44847.

The product of its digits is 8100, while the sum is 30.

Adding to 215311323135 its reverse (531323113512), we get a palindrome (746634436647).

The spelling of 215311323135 in words is "two hundred fifteen billion, three hundred eleven million, three hundred twenty-three thousand, one hundred thirty-five".