251043223401 has 16 divisors (see below), whose sum is σ = 372407219200. Its totient is φ = 167141049264.

The previous prime is 251043223399. The next prime is 251043223423. The reversal of 251043223401 is 104322340152.

251043223401 is a `hidden beast` number, since 25 + 10 + 4 + 3 + 223 + 401 = 666.

It is not a de Polignac number, because 251043223401 - 2¹ = 251043223399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251043223471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6120841 + ... + 6161718.

It is an arithmetic number, because the mean of its divisors is an integer number (23275451200).

Almost surely, 2^251043223401 is an apocalyptic number.

It is an amenable number.

251043223401 is a deficient number, since it is larger than the sum of its proper divisors (121363995799).

251043223401 is a wasteful number, since it uses less digits than its factorization.

251043223401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12283325 (or 12283319 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 251043223401 its reverse (104322340152), we get a palindrome (355365563553).

The spelling of 251043223401 in words is "two hundred fifty-one billion, forty-three million, two hundred twenty-three thousand, four hundred one".