251252297842 has 32 divisors (see below), whose sum is σ = 474637629312. Its totient is φ = 97084963584.

The previous prime is 251252297797. The next prime is 251252297851. The reversal of 251252297842 is 248792252152.

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 15 ways as a sum of consecutive naturals, for example, 16044583 + ... + 16060234.

It is an arithmetic number, because the mean of its divisors is an integer number (14832425916).

Almost surely, 2^251252297842 is an apocalyptic number.

251252297842 is a deficient number, since it is larger than the sum of its proper divisors (223385331470).

251252297842 is a wasteful number, since it uses less digits than its factorization.

251252297842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32104882.

The product of its digits is 1612800, while the sum is 49.

The spelling of 251252297842 in words is "two hundred fifty-one billion, two hundred fifty-two million, two hundred ninety-seven thousand, eight hundred forty-two".