2513128253 has 4 divisors (see below), whose sum is σ = 2513604828. Its totient is φ = 2512651680.

The previous prime is 2513128231. The next prime is 2513128279. The reversal of 2513128253 is 3528213152.

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 1576645849 + 936482404 = 39707^2 + 30602^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513128253 - 2¹⁰ = 2513127229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2513128223) 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, 230288 + ... + 240953.

It is an arithmetic number, because the mean of its divisors is an integer number (628401207).

Almost surely, 2^2513128253 is an apocalyptic number.

It is an amenable number.

2513128253 is a deficient number, since it is larger than the sum of its proper divisors (476575).

2513128253 is an equidigital number, since it uses as much as digits as its factorization.

2513128253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476574.

The product of its digits is 14400, while the sum is 32.

The square root of 2513128253 is about 50131.1106300269. The cubic root of 2513128253 is about 1359.5803659558.

The spelling of 2513128253 in words is "two billion, five hundred thirteen million, one hundred twenty-eight thousand, two hundred fifty-three".