251240032 has 24 divisors (see below), whose sum is σ = 501599952. Its totient is φ = 123849600.

The previous prime is 251240009. The next prime is 251240039. The reversal of 251240032 is 230042152.

It is a super-2 number, since 2×251240032² = 126243107358722048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251239991 and 251240009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251240039) 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, 53019 + ... + 57562.

It is an arithmetic number, because the mean of its divisors is an integer number (20899998).

Almost surely, 2^251240032 is an apocalyptic number.

It is an amenable number.

251240032 is a deficient number, since it is larger than the sum of its proper divisors (250359920).

251240032 is a wasteful number, since it uses less digits than its factorization.

251240032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110662 (or 110654 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 251240032 is about 15850.5530502882. The cubic root of 251240032 is about 631.0003691972. Note that the first 3 decimals are identical.

Adding to 251240032 its reverse (230042152), we get a palindrome (481282184).

The spelling of 251240032 in words is "two hundred fifty-one million, two hundred forty thousand, thirty-two".