1222447651 has 2 divisors, whose sum is σ = 1222447652. Its totient is φ = 1222447650.

The previous prime is 1222447621. The next prime is 1222447657. The reversal of 1222447651 is 1567442221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222447651 - 2¹³ = 1222439459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222447657) 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 as a sum of consecutive naturals, namely, 611223825 + 611223826.

It is an arithmetic number, because the mean of its divisors is an integer number (611223826).

Almost surely, 2^1222447651 is an apocalyptic number.

1222447651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222447651 is an equidigital number, since it uses as much as digits as its factorization.

1222447651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 1222447651 is about 34963.5188589478. The cubic root of 1222447651 is about 1069.2438396435.

Adding to 1222447651 its reverse (1567442221), we get a palindrome (2789889872).

The spelling of 1222447651 in words is "one billion, two hundred twenty-two million, four hundred forty-seven thousand, six hundred fifty-one".