251191130196 has 24 divisors (see below), whose sum is σ = 587574275904. Its totient is φ = 83521571200.

The previous prime is 251191130189. The next prime is 251191130221. The reversal of 251191130196 is 691031191152.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 26095680 + ... + 26105303.

It is an arithmetic number, because the mean of its divisors is an integer number (24482261496).

Almost surely, 2^251191130196 is an apocalyptic number.

It is an amenable number.

251191130196 is an abundant number, since it is smaller than the sum of its proper divisors (336383145708).

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

251191130196 is a wasteful number, since it uses less digits than its factorization.

251191130196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52201391 (or 52201389 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 39.

The spelling of 251191130196 in words is "two hundred fifty-one billion, one hundred ninety-one million, one hundred thirty thousand, one hundred ninety-six".