251132404 has 12 divisors (see below), whose sum is σ = 439628644. Its totient is φ = 125524224.

The previous prime is 251132393. The next prime is 251132407. The reversal of 251132404 is 404231152.

It can be written as a sum of positive squares in 2 ways, for example, as 4579600 + 246552804 = 2140^2 + 15702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251132407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5764 + ... + 23140.

Almost surely, 2^251132404 is an apocalyptic number.

It is an amenable number.

251132404 is a deficient number, since it is larger than the sum of its proper divisors (188496240).

251132404 is a wasteful number, since it uses less digits than its factorization.

251132404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20994 (or 20992 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 251132404 is about 15847.1576000240. The cubic root of 251132404 is about 630.9102521788.

Adding to 251132404 its reverse (404231152), we get a palindrome (655363556).

The spelling of 251132404 in words is "two hundred fifty-one million, one hundred thirty-two thousand, four hundred four".