251055740 has 48 divisors (see below), whose sum is σ = 597666720. Its totient is φ = 87816960.

The previous prime is 251055733. The next prime is 251055743. The reversal of 251055740 is 47550152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251055743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20471 + ... + 30350.

It is an arithmetic number, because the mean of its divisors is an integer number (12451390).

Almost surely, 2^251055740 is an apocalyptic number.

251055740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251055740 is an abundant number, since it is smaller than the sum of its proper divisors (346610980).

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

251055740 is a wasteful number, since it uses less digits than its factorization.

251055740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50862 (or 50860 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 251055740 is about 15844.7385589034. The cubic root of 251055740 is about 630.8460456414.

The spelling of 251055740 in words is "two hundred fifty-one million, fifty-five thousand, seven hundred forty".