8513400253 has 4 divisors (see below), whose sum is σ = 8537794300. Its totient is φ = 8489006208.

The previous prime is 8513400239. The next prime is 8513400257. The reversal of 8513400253 is 3520043158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3520043158 = 2 ⋅1760021579.

It can be written as a sum of positive squares in 2 ways, for example, as 7451487684 + 1061912569 = 86322^2 + 32587^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8513400253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8513400257) 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, 12196500 + ... + 12197197.

It is an arithmetic number, because the mean of its divisors is an integer number (2134448575).

Almost surely, 2^8513400253 is an apocalyptic number.

It is an amenable number.

8513400253 is a deficient number, since it is larger than the sum of its proper divisors (24394047).

8513400253 is a wasteful number, since it uses less digits than its factorization.

8513400253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24394046.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 8513400253 is about 92268.0890286561. The cubic root of 8513400253 is about 2041.8994429946.

The spelling of 8513400253 in words is "eight billion, five hundred thirteen million, four hundred thousand, two hundred fifty-three".