251421321230200 has 96 divisors (see below), whose sum is σ = 637718805884160. Its totient is φ = 91422650505600.

The previous prime is 251421321230197. The next prime is 251421321230243. The reversal of 251421321230200 is 2032123124152.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59620609 + ... + 63698191.

It is an arithmetic number, because the mean of its divisors is an integer number (6642904227960).

Almost surely, 2^{251421321230200} is an apocalyptic number.

251421321230200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251421321230200 is an abundant number, since it is smaller than the sum of its proper divisors (386297484653960).

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

251421321230200 is a wasteful number, since it uses less digits than its factorization.

251421321230200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4105637 (or 4105628 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 251421321230200 its reverse (2032123124152), we get a palindrome (253453444354352).

The spelling of 251421321230200 in words is "two hundred fifty-one trillion, four hundred twenty-one billion, three hundred twenty-one million, two hundred thirty thousand, two hundred".