251244342 has 40 divisors (see below), whose sum is σ = 582397200. Its totient is φ = 80858736.

The previous prime is 251244337. The next prime is 251244347. The reversal of 251244342 is 243442152.

It is an interprime number because it is at equal distance from previous prime (251244337) and next prime (251244347).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251244347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22042 + ... + 31437.

It is an arithmetic number, because the mean of its divisors is an integer number (14559930).

Almost surely, 2^251244342 is an apocalyptic number.

251244342 is an abundant number, since it is smaller than the sum of its proper divisors (331152858).

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

251244342 is a wasteful number, since it uses less digits than its factorization.

251244342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53522 (or 53513 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 251244342 is about 15850.6890071063. The cubic root of 251244342 is about 631.0039774279.

Adding to 251244342 its reverse (243442152), we get a palindrome (494686494).

The spelling of 251244342 in words is "two hundred fifty-one million, two hundred forty-four thousand, three hundred forty-two".