251112201 has 16 divisors (see below), whose sum is σ = 343699200. Its totient is φ = 163020368.

The previous prime is 251112139. The next prime is 251112209. The reversal of 251112201 is 102211152.

It is a cyclic number.

It is not a de Polignac number, because 251112201 - 2⁹ = 251111689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251112209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12310 + ... + 25568.

It is an arithmetic number, because the mean of its divisors is an integer number (21481200).

Almost surely, 2^251112201 is an apocalyptic number.

It is an amenable number.

251112201 is a deficient number, since it is larger than the sum of its proper divisors (92586999).

251112201 is a wasteful number, since it uses less digits than its factorization.

251112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13428.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 251112201 is about 15846.5201542799. The cubic root of 251112201 is about 630.8933333192.

Adding to 251112201 its reverse (102211152), we get a palindrome (353323353).

The spelling of 251112201 in words is "two hundred fifty-one million, one hundred twelve thousand, two hundred one".