1513211525213 has 4 divisors (see below), whose sum is σ = 1513214461500. Its totient is φ = 1513208588928.

The previous prime is 1513211525191. The next prime is 1513211525239. The reversal of 1513211525213 is 3125251123151.

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 1195265531524 + 317945993689 = 1093282^2 + 563867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1513211525213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1513211525213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513211525113) 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, 468020 + ... + 1801517.

It is an arithmetic number, because the mean of its divisors is an integer number (378303615375).

Almost surely, 2^{1513211525213} is an apocalyptic number.

It is an amenable number.

1513211525213 is a deficient number, since it is larger than the sum of its proper divisors (2936287).

1513211525213 is an equidigital number, since it uses as much as digits as its factorization.

1513211525213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936286.

The product of its digits is 9000, while the sum is 32.

Adding to 1513211525213 its reverse (3125251123151), we get a palindrome (4638462648364).

The spelling of 1513211525213 in words is "one trillion, five hundred thirteen billion, two hundred eleven million, five hundred twenty-five thousand, two hundred thirteen".