215312013 has 40 divisors (see below), whose sum is σ = 368808000. Its totient is φ = 122627520.

The previous prime is 215312011. The next prime is 215312057. The reversal of 215312013 is 310213512.

It is not a de Polignac number, because 215312013 - 2¹ = 215312011 is a prime.

It is a super-2 number, since 2×215312013² = 92718525884224338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215312011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 282553 + ... + 283313.

It is an arithmetic number, because the mean of its divisors is an integer number (9220200).

Almost surely, 2^215312013 is an apocalyptic number.

It is an amenable number.

215312013 is a deficient number, since it is larger than the sum of its proper divisors (153495987).

215312013 is an equidigital number, since it uses as much as digits as its factorization.

215312013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 215312013 is about 14673.5139963132. The cubic root of 215312013 is about 599.3622974659.

Adding to 215312013 its reverse (310213512), we get a palindrome (525525525).

The spelling of 215312013 in words is "two hundred fifteen million, three hundred twelve thousand, thirteen".