251250025153 has 4 divisors (see below), whose sum is σ = 251251172740. Its totient is φ = 251248877568.

The previous prime is 251250025123. The next prime is 251250025157. The reversal of 251250025153 is 351520052152.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21524410944 + 229725614209 = 146712^2 + 479297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251250025153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251250025157) 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, 132000 + ... + 721057.

It is an arithmetic number, because the mean of its divisors is an integer number (62812793185).

Almost surely, 2^251250025153 is an apocalyptic number.

It is an amenable number.

251250025153 is a deficient number, since it is larger than the sum of its proper divisors (1147587).

251250025153 is an equidigital number, since it uses as much as digits as its factorization.

251250025153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147586.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 251250025153 in words is "two hundred fifty-one billion, two hundred fifty million, twenty-five thousand, one hundred fifty-three".