2012222551 has 4 divisors (see below), whose sum is σ = 2099710512. Its totient is φ = 1924734592.

The previous prime is 2012222549. The next prime is 2012222567. The reversal of 2012222551 is 1552222102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2012222551 - 2¹ = 2012222549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012622551) 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 3 ways as a sum of consecutive naturals, for example, 43743946 + ... + 43743991.

It is an arithmetic number, because the mean of its divisors is an integer number (524927628).

Almost surely, 2^2012222551 is an apocalyptic number.

2012222551 is a deficient number, since it is larger than the sum of its proper divisors (87487961).

2012222551 is an equidigital number, since it uses as much as digits as its factorization.

2012222551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87487960.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2012222551 is about 44857.8036800733. The cubic root of 2012222551 is about 1262.4824141066.

Adding to 2012222551 its reverse (1552222102), we get a palindrome (3564444653).

The spelling of 2012222551 in words is "two billion, twelve million, two hundred twenty-two thousand, five hundred fifty-one".