251113423 has 8 divisors (see below), whose sum is σ = 282779136. Its totient is φ = 220920600.

The previous prime is 251113403. The next prime is 251113451. The reversal of 251113423 is 324311152.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 251113423 - 2¹⁷ = 250982351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251113394 and 251113403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251113403) 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, 367861 + ... + 368542.

It is an arithmetic number, because the mean of its divisors is an integer number (35347392).

Almost surely, 2^251113423 is an apocalyptic number.

251113423 is a deficient number, since it is larger than the sum of its proper divisors (31665713).

251113423 is a wasteful number, since it uses less digits than its factorization.

251113423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736445.

The product of its digits is 720, while the sum is 22.

The square root of 251113423 is about 15846.5587115941. The cubic root of 251113423 is about 630.8943567002.

Adding to 251113423 its reverse (324311152), we get a palindrome (575424575).

The spelling of 251113423 in words is "two hundred fifty-one million, one hundred thirteen thousand, four hundred twenty-three".