251330394 has 16 divisors (see below), whose sum is σ = 574469568. Its totient is φ = 71808672.

The previous prime is 251330389. The next prime is 251330413. The reversal of 251330394 is 493033152.

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, 2991987 + ... + 2992070.

It is an arithmetic number, because the mean of its divisors is an integer number (35904348).

Almost surely, 2^251330394 is an apocalyptic number.

251330394 is an abundant number, since it is smaller than the sum of its proper divisors (323139174).

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

251330394 is a wasteful number, since it uses less digits than its factorization.

251330394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5984069.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 251330394 is about 15853.4032308524. The cubic root of 251330394 is about 631.0760095061.

The spelling of 251330394 in words is "two hundred fifty-one million, three hundred thirty thousand, three hundred ninety-four".