251240234423 has 8 divisors (see below), whose sum is σ = 266027366880. Its totient is φ = 236454023680.

The previous prime is 251240234417. The next prime is 251240234437. The reversal of 251240234423 is 324432042152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251240234423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251240234423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251240264423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376463 + ... + 802623.

It is an arithmetic number, because the mean of its divisors is an integer number (33253420860).

Almost surely, 2^251240234423 is an apocalyptic number.

251240234423 is a deficient number, since it is larger than the sum of its proper divisors (14787132457).

251240234423 is a wasteful number, since it uses less digits than its factorization.

251240234423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460857.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 251240234423 its reverse (324432042152), we get a palindrome (575672276575).

The spelling of 251240234423 in words is "two hundred fifty-one billion, two hundred forty million, two hundred thirty-four thousand, four hundred twenty-three".