251798472 has 24 divisors (see below), whose sum is σ = 681954390. Its totient is φ = 83932800.

The previous prime is 251798467. The next prime is 251798473. The reversal of 251798472 is 274897152.

It is a happy number.

251798472 is a `hidden beast` number, since 2 + 5 + 179 + 8 + 472 = 666.

251798472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 163175076 + 88623396 = 12774^2 + 9414^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251798473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1748529 + ... + 1748672.

Almost surely, 2^251798472 is an apocalyptic number.

It is an amenable number.

251798472 is an abundant number, since it is smaller than the sum of its proper divisors (430155918).

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

251798472 is a wasteful number, since it uses less digits than its factorization.

251798472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497213 (or 3497206 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 251798472 is about 15868.1590614665. The cubic root of 251798472 is about 631.4675387613.

The spelling of 251798472 in words is "two hundred fifty-one million, seven hundred ninety-eight thousand, four hundred seventy-two".