1222513651 has 2 divisors, whose sum is σ = 1222513652. Its totient is φ = 1222513650.

The previous prime is 1222513631. The next prime is 1222513657. The reversal of 1222513651 is 1563152221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1563152221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222513651 - 2²³ = 1214125043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222513657) 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, 611256825 + 611256826.

It is an arithmetic number, because the mean of its divisors is an integer number (611256826).

Almost surely, 2^1222513651 is an apocalyptic number.

1222513651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222513651 is an equidigital number, since it uses as much as digits as its factorization.

1222513651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 1222513651 is about 34964.4626871342. The cubic root of 1222513651 is about 1069.2630821371.

Adding to 1222513651 its reverse (1563152221), we get a palindrome (2785665872).

The spelling of 1222513651 in words is "one billion, two hundred twenty-two million, five hundred thirteen thousand, six hundred fifty-one".