1224222251 has 8 divisors (see below), whose sum is σ = 1399624704. Its totient is φ = 1048948200.

The previous prime is 1224222247. The next prime is 1224222253. The reversal of 1224222251 is 1522224221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224222251 - 2² = 1224222247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224222253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10715 + ... + 50628.

It is an arithmetic number, because the mean of its divisors is an integer number (174953088).

Almost surely, 2^1224222251 is an apocalyptic number.

1224222251 is a deficient number, since it is larger than the sum of its proper divisors (175402453).

1224222251 is an equidigital number, since it uses as much as digits as its factorization.

1224222251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64201.

The product of its digits is 1280, while the sum is 23.

The square root of 1224222251 is about 34988.8875359020. The cubic root of 1224222251 is about 1069.7609886272.

Adding to 1224222251 its reverse (1522224221), we get a palindrome (2746446472).

The spelling of 1224222251 in words is "one billion, two hundred twenty-four million, two hundred twenty-two thousand, two hundred fifty-one".