251099982 has 48 divisors (see below), whose sum is σ = 638587872. Its totient is φ = 69802560.

The previous prime is 251099963. The next prime is 251100001. The reversal of 251099982 is 289990152.

It is an interprime number because it is at equal distance from previous prime (251099963) and next prime (251100001).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22269 + ... + 31592.

It is an arithmetic number, because the mean of its divisors is an integer number (13303914).

Almost surely, 2^251099982 is an apocalyptic number.

251099982 is an abundant number, since it is smaller than the sum of its proper divisors (387487890).

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

251099982 is a wasteful number, since it uses less digits than its factorization.

251099982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53913 (or 53910 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 251099982 is about 15846.1346075313. The cubic root of 251099982 is about 630.8831001636.

The spelling of 251099982 in words is "two hundred fifty-one million, ninety-nine thousand, nine hundred eighty-two".