1222247951 has 4 divisors (see below), whose sum is σ = 1222357872. Its totient is φ = 1222138032.

The previous prime is 1222247933. The next prime is 1222247977. The reversal of 1222247951 is 1597422221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222247951 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 (1222247921) 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, 36131 + ... + 61236.

It is an arithmetic number, because the mean of its divisors is an integer number (305589468).

Almost surely, 2^1222247951 is an apocalyptic number.

1222247951 is a deficient number, since it is larger than the sum of its proper divisors (109921).

1222247951 is an equidigital number, since it uses as much as digits as its factorization.

1222247951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109920.

The product of its digits is 20160, while the sum is 35.

The square root of 1222247951 is about 34960.6629084747. The cubic root of 1222247951 is about 1069.1856123040.

The spelling of 1222247951 in words is "one billion, two hundred twenty-two million, two hundred forty-seven thousand, nine hundred fifty-one".