251112006 has 12 divisors (see below), whose sum is σ = 544076052. Its totient is φ = 83703996.

The previous prime is 251111989. The next prime is 251112013. The reversal of 251112006 is 600211152.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 13950667 = 251112006 / (2 + 5 + 1 + 1 + 1 + 2 + 0 + 0 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 251112006.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6975316 + ... + 6975351.

It is an arithmetic number, because the mean of its divisors is an integer number (45339671).

Almost surely, 2^251112006 is an apocalyptic number.

251112006 is an abundant number, since it is smaller than the sum of its proper divisors (292964046).

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

251112006 is a wasteful number, since it uses less digits than its factorization.

251112006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13950675 (or 13950672 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 251112006 is about 15846.5140015083. The cubic root of 251112006 is about 630.8931700134.

Adding to 251112006 its reverse (600211152), we get a palindrome (851323158).

The spelling of 251112006 in words is "two hundred fifty-one million, one hundred twelve thousand, six".