251153410242 has 16 divisors (see below), whose sum is σ = 574064937792. Its totient is φ = 71758117200.

The previous prime is 251153410237. The next prime is 251153410283. The reversal of 251153410242 is 242014351152.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2989921509 + ... + 2989921592.

It is an arithmetic number, because the mean of its divisors is an integer number (35879058612).

Almost surely, 2^251153410242 is an apocalyptic number.

251153410242 is an abundant number, since it is smaller than the sum of its proper divisors (322911527550).

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

251153410242 is a wasteful number, since it uses less digits than its factorization.

251153410242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979843113.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 251153410242 its reverse (242014351152), we get a palindrome (493167761394).

The spelling of 251153410242 in words is "two hundred fifty-one billion, one hundred fifty-three million, four hundred ten thousand, two hundred forty-two".