251248030442 has 32 divisors (see below), whose sum is σ = 384394118400. Its totient is φ = 123145103488.

The previous prime is 251248030441. The next prime is 251248030471. The reversal of 251248030442 is 244030842152.

It is not an unprimeable number, because it can be changed into a prime (251248030441) 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, 11043683 + ... + 11066409.

It is an arithmetic number, because the mean of its divisors is an integer number (12012316200).

Almost surely, 2^251248030442 is an apocalyptic number.

251248030442 is a deficient number, since it is larger than the sum of its proper divisors (133146087958).

251248030442 is a wasteful number, since it uses less digits than its factorization.

251248030442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23350.

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 251248030442 its reverse (244030842152), we get a palindrome (495278872594).

The spelling of 251248030442 in words is "two hundred fifty-one billion, two hundred forty-eight million, thirty thousand, four hundred forty-two".