253121425525 has 12 divisors (see below), whose sum is σ = 323995425664. Its totient is φ = 195964974000.

The previous prime is 253121425457. The next prime is 253121425537. The reversal of 253121425525 is 525524121352.

It is not a de Polignac number, because 253121425525 - 2⁷ = 253121425397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163303371 + ... + 163304920.

Almost surely, 2^253121425525 is an apocalyptic number.

253121425525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253121425525 is a deficient number, since it is larger than the sum of its proper divisors (70874000139).

253121425525 is a wasteful number, since it uses less digits than its factorization.

253121425525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326608332 (or 326608327 counting only the distinct ones).

The product of its digits is 120000, while the sum is 37.

Adding to 253121425525 its reverse (525524121352), we get a palindrome (778645546877).

The spelling of 253121425525 in words is "two hundred fifty-three billion, one hundred twenty-one million, four hundred twenty-five thousand, five hundred twenty-five".