251422423 has 16 divisors (see below), whose sum is σ = 292965120. Its totient is φ = 211305600.

The previous prime is 251422403. The next prime is 251422441. The reversal of 251422423 is 324224152.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251422423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251422403) 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 15 ways as a sum of consecutive naturals, for example, 284943 + ... + 285823.

It is an arithmetic number, because the mean of its divisors is an integer number (18310320).

Almost surely, 2^251422423 is an apocalyptic number.

251422423 is a deficient number, since it is larger than the sum of its proper divisors (41542697).

251422423 is an equidigital number, since it uses as much as digits as its factorization.

251422423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638.

The product of its digits is 3840, while the sum is 25.

The square root of 251422423 is about 15856.3054650193. The cubic root of 251422423 is about 631.1530265963.

Adding to 251422423 its reverse (324224152), we get a palindrome (575646575).

The spelling of 251422423 in words is "two hundred fifty-one million, four hundred twenty-two thousand, four hundred twenty-three".