125516515253 has 4 divisors (see below), whose sum is σ = 127284353568. Its totient is φ = 123748676940.

The previous prime is 125516515249. The next prime is 125516515321. The reversal of 125516515253 is 352515615521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 352515615521 = 113 ⋅3119607217.

It is a cyclic number.

It is not a de Polignac number, because 125516515253 - 2² = 125516515249 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 125516515253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125516515153) 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, 883919051 + ... + 883919192.

It is an arithmetic number, because the mean of its divisors is an integer number (31821088392).

Almost surely, 2^125516515253 is an apocalyptic number.

It is an amenable number.

125516515253 is a deficient number, since it is larger than the sum of its proper divisors (1767838315).

125516515253 is an equidigital number, since it uses as much as digits as its factorization.

125516515253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767838314.

The product of its digits is 225000, while the sum is 41.

The spelling of 125516515253 in words is "one hundred twenty-five billion, five hundred sixteen million, five hundred fifteen thousand, two hundred fifty-three".