222012851 has 2 divisors, whose sum is σ = 222012852. Its totient is φ = 222012850.

The previous prime is 222012829. The next prime is 222012907. The reversal of 222012851 is 158210222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222012851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222012821) 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 as a sum of consecutive naturals, namely, 111006425 + 111006426.

It is an arithmetic number, because the mean of its divisors is an integer number (111006426).

Almost surely, 2^222012851 is an apocalyptic number.

222012851 is a deficient number, since it is larger than the sum of its proper divisors (1).

222012851 is an equidigital number, since it uses as much as digits as its factorization.

222012851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 222012851 is about 14900.0956708338. The cubic root of 222012851 is about 605.5165781245.

It can be divided in two parts, 22201 and 2851, that added together give a palindrome (25052).

The spelling of 222012851 in words is "two hundred twenty-two million, twelve thousand, eight hundred fifty-one".