251230253460 has 24 divisors (see below), whose sum is σ = 703444709856. Its totient is φ = 66994734240.

The previous prime is 251230253459. The next prime is 251230253467. The reversal of 251230253460 is 64352032152.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251230253467) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2093585386 + ... + 2093585505.

It is an arithmetic number, because the mean of its divisors is an integer number (29310196244).

Almost surely, 2^251230253460 is an apocalyptic number.

251230253460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251230253460 is an abundant number, since it is smaller than the sum of its proper divisors (452214456396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251230253460 is a wasteful number, since it uses less digits than its factorization.

251230253460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187170903 (or 4187170901 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 251230253460 in words is "two hundred fifty-one billion, two hundred thirty million, two hundred fifty-three thousand, four hundred sixty".