201510115513 has 6 divisors (see below), whose sum is σ = 234409726266. Its totient is φ = 172722956112.

The previous prime is 201510115483. The next prime is 201510115529. The reversal of 201510115513 is 315511015102.

It can be written as a sum of positive squares in only one way, i.e., 199176549264 + 2333566249 = 446292^2 + 48307^2 .

It is not a de Polignac number, because 201510115513 - 2²⁵ = 201476561081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201510110513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2056225620 + ... + 2056225717.

It is an arithmetic number, because the mean of its divisors is an integer number (39068287711).

Almost surely, 2^201510115513 is an apocalyptic number.

It is an amenable number.

201510115513 is a deficient number, since it is larger than the sum of its proper divisors (32899610753).

201510115513 is an equidigital number, since it uses as much as digits as its factorization.

201510115513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112451351 (or 4112451344 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 201510115513 in words is "two hundred one billion, five hundred ten million, one hundred fifteen thousand, five hundred thirteen".