251231241 has 16 divisors (see below), whose sum is σ = 345255680. Its totient is φ = 162403920.

The previous prime is 251231237. The next prime is 251231311. The reversal of 251231241 is 142132152.

It is not a de Polignac number, because 251231241 - 2² = 251231237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (251231041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10926 + ... + 24936.

It is an arithmetic number, because the mean of its divisors is an integer number (21578480).

Almost surely, 2^251231241 is an apocalyptic number.

It is an amenable number.

251231241 is a deficient number, since it is larger than the sum of its proper divisors (94024439).

251231241 is a wasteful number, since it uses less digits than its factorization.

251231241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14196.

The product of its digits is 480, while the sum is 21.

The square root of 251231241 is about 15850.2757389264. The cubic root of 251231241 is about 630.9930094505.

Adding to 251231241 its reverse (142132152), we get a palindrome (393363393).

The spelling of 251231241 in words is "two hundred fifty-one million, two hundred thirty-one thousand, two hundred forty-one".