1222657651 has 4 divisors (see below), whose sum is σ = 1222856752. Its totient is φ = 1222458552.

The previous prime is 1222657613. The next prime is 1222657673. The reversal of 1222657651 is 1567562221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1567562221 = 223 ⋅7029427.

It is a cyclic number.

It is not a de Polignac number, because 1222657651 - 2⁷ = 1222657523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222657651.

It is not an unprimeable number, because it can be changed into a prime (1222657691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90036 + ... + 102721.

It is an arithmetic number, because the mean of its divisors is an integer number (305714188).

Almost surely, 2^1222657651 is an apocalyptic number.

1222657651 is a deficient number, since it is larger than the sum of its proper divisors (199101).

1222657651 is an equidigital number, since it uses as much as digits as its factorization.

1222657651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199100.

The product of its digits is 50400, while the sum is 37.

The square root of 1222657651 is about 34966.5218602022. The cubic root of 1222657651 is about 1069.3050633558.

The spelling of 1222657651 in words is "one billion, two hundred twenty-two million, six hundred fifty-seven thousand, six hundred fifty-one".