251303243412 has 48 divisors (see below), whose sum is σ = 631511717760. Its totient is φ = 77320184448.

The previous prime is 251303243309. The next prime is 251303243437. The reversal of 251303243412 is 214342303152.

251303243412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 251303243412.

It is a congruent number.

It is an unprimeable number.

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, 5424298 + ... + 5470430.

It is an arithmetic number, because the mean of its divisors is an integer number (13156494120).

Almost surely, 2^251303243412 is an apocalyptic number.

It is an amenable number.

251303243412 is an abundant number, since it is smaller than the sum of its proper divisors (380208474348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251303243412 is a wasteful number, since it uses less digits than its factorization.

251303243412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81072 (or 81070 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 251303243412 its reverse (214342303152), we get a palindrome (465645546564).

The spelling of 251303243412 in words is "two hundred fifty-one billion, three hundred three million, two hundred forty-three thousand, four hundred twelve".