251480380 has 24 divisors (see below), whose sum is σ = 529205040. Its totient is φ = 100383360.

The previous prime is 251480363. The next prime is 251480381. The reversal of 251480380 is 83084152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251480381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2985 + ... + 22624.

It is an arithmetic number, because the mean of its divisors is an integer number (22050210).

Almost surely, 2^251480380 is an apocalyptic number.

251480380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251480380 is an abundant number, since it is smaller than the sum of its proper divisors (277724660).

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

251480380 is a wasteful number, since it uses less digits than its factorization.

251480380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26109 (or 26107 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 251480380 is about 15858.1329291944. The cubic root of 251480380 is about 631.2015199183.

The spelling of 251480380 in words is "two hundred fifty-one million, four hundred eighty thousand, three hundred eighty".