251115333140 has 48 divisors (see below), whose sum is σ = 607277430144. Its totient is φ = 85439452800.

The previous prime is 251115333097. The next prime is 251115333181. The reversal of 251115333140 is 41333511152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6827771 + ... + 6864450.

It is an arithmetic number, because the mean of its divisors is an integer number (12651613128).

Almost surely, 2^251115333140 is an apocalyptic number.

251115333140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251115333140 is an abundant number, since it is smaller than the sum of its proper divisors (356162097004).

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

251115333140 is a wasteful number, since it uses less digits than its factorization.

251115333140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13692368 (or 13692366 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 251115333140 its reverse (41333511152), we get a palindrome (292448844292).

The spelling of 251115333140 in words is "two hundred fifty-one billion, one hundred fifteen million, three hundred thirty-three thousand, one hundred forty".