1222322551 has 4 divisors (see below), whose sum is σ = 1228527432. Its totient is φ = 1216117672.

The previous prime is 1222322513. The next prime is 1222322567. The reversal of 1222322551 is 1552232221.

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 1222322551 - 2¹⁷ = 1222191479 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 (1222322251) 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, 3102145 + ... + 3102538.

It is an arithmetic number, because the mean of its divisors is an integer number (307131858).

Almost surely, 2^1222322551 is an apocalyptic number.

1222322551 is a deficient number, since it is larger than the sum of its proper divisors (6204881).

1222322551 is an equidigital number, since it uses as much as digits as its factorization.

1222322551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204880.

The product of its digits is 2400, while the sum is 25.

The square root of 1222322551 is about 34961.7298056032. The cubic root of 1222322551 is about 1069.2073644708.

Adding to 1222322551 its reverse (1552232221), we get a palindrome (2774554772).

The spelling of 1222322551 in words is "one billion, two hundred twenty-two million, three hundred twenty-two thousand, five hundred fifty-one".