15315500213 has 16 divisors (see below), whose sum is σ = 17073354480. Its totient is φ = 13641094656.

The previous prime is 15315500203. The next prime is 15315500237. The reversal of 15315500213 is 31200551351.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2627280049 + 12688220164 = 51257^2 + 112642^2 .

It is a cyclic number.

It is not a de Polignac number, because 15315500213 - 2⁴ = 15315500197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15315500203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612431 + ... + 636947.

It is an arithmetic number, because the mean of its divisors is an integer number (1067084655).

Almost surely, 2^15315500213 is an apocalyptic number.

15315500213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15315500213 is a deficient number, since it is larger than the sum of its proper divisors (1757854267).

15315500213 is a wasteful number, since it uses less digits than its factorization.

15315500213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26216.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 15315500213 in words is "fifteen billion, three hundred fifteen million, five hundred thousand, two hundred thirteen".