251442132 has 24 divisors (see below), whose sum is σ = 589682016. Its totient is φ = 83387808.

The previous prime is 251442097. The next prime is 251442203. The reversal of 251442132 is 231244152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50818 + ... + 55545.

It is an arithmetic number, because the mean of its divisors is an integer number (24570084).

Almost surely, 2^251442132 is an apocalyptic number.

It is an amenable number.

251442132 is an abundant number, since it is smaller than the sum of its proper divisors (338239884).

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

251442132 is a wasteful number, since it uses less digits than its factorization.

251442132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106567 (or 106565 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 251442132 is about 15856.9269406149. The cubic root of 251442132 is about 631.1695181908.

Adding to 251442132 its reverse (231244152), we get a palindrome (482686284).

The spelling of 251442132 in words is "two hundred fifty-one million, four hundred forty-two thousand, one hundred thirty-two".