251242204104 has 24 divisors (see below), whose sum is σ = 680447636310. Its totient is φ = 83747401344.

The previous prime is 251242204067. The next prime is 251242204163. The reversal of 251242204104 is 401402242152.

It is a happy number.

251242204104 is a `hidden beast` number, since 2 + 5 + 1 + 24 + 220 + 410 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 222785888004 + 28456316100 = 472002^2 + 168690^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1744737457 + ... + 1744737600.

Almost surely, 2^251242204104 is an apocalyptic number.

251242204104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

251242204104 is an abundant number, since it is smaller than the sum of its proper divisors (429205432206).

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

251242204104 is a wasteful number, since it uses less digits than its factorization.

251242204104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489475069 (or 3489475062 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 251242204104 its reverse (401402242152), we get a palindrome (652644446256).

The spelling of 251242204104 in words is "two hundred fifty-one billion, two hundred forty-two million, two hundred four thousand, one hundred four".