1513211253 has 4 divisors (see below), whose sum is σ = 2017615008. Its totient is φ = 1008807500.

The previous prime is 1513211251. The next prime is 1513211257. The reversal of 1513211253 is 3521123151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1513211253 - 2¹ = 1513211251 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 (1513211251) 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, 252201873 + ... + 252201878.

It is an arithmetic number, because the mean of its divisors is an integer number (504403752).

Almost surely, 2^1513211253 is an apocalyptic number.

It is an amenable number.

1513211253 is a deficient number, since it is larger than the sum of its proper divisors (504403755).

1513211253 is an equidigital number, since it uses as much as digits as its factorization.

1513211253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504403754.

The product of its digits is 900, while the sum is 24.

The square root of 1513211253 is about 38900.0161053951. The cubic root of 1513211253 is about 1148.0651151114.

The spelling of 1513211253 in words is "one billion, five hundred thirteen million, two hundred eleven thousand, two hundred fifty-three".