215268013 has 4 divisors (see below), whose sum is σ = 215332348. Its totient is φ = 215203680.

The previous prime is 215267989. The next prime is 215268023. The reversal of 215268013 is 310862512.

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 123165604 + 92102409 = 11098^2 + 9597^2 .

It is a cyclic number.

It is not a de Polignac number, because 215268013 - 2⁵ = 215267981 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 (215268023) 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, 26856 + ... + 33937.

It is an arithmetic number, because the mean of its divisors is an integer number (53833087).

Almost surely, 2^215268013 is an apocalyptic number.

It is an amenable number.

215268013 is a deficient number, since it is larger than the sum of its proper divisors (64335).

215268013 is an equidigital number, since it uses as much as digits as its factorization.

215268013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64334.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 215268013 is about 14672.0146196765. The cubic root of 215268013 is about 599.3214672039.

The spelling of 215268013 in words is "two hundred fifteen million, two hundred sixty-eight thousand, thirteen".