1222628651 has 4 divisors (see below), whose sum is σ = 1252448904. Its totient is φ = 1192808400.

The previous prime is 1222628647. The next prime is 1222628653. The reversal of 1222628651 is 1568262221.

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 1222628651 - 2² = 1222628647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222628653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14910065 + ... + 14910146.

It is an arithmetic number, because the mean of its divisors is an integer number (313112226).

Almost surely, 2^1222628651 is an apocalyptic number.

1222628651 is a deficient number, since it is larger than the sum of its proper divisors (29820253).

1222628651 is an equidigital number, since it uses as much as digits as its factorization.

1222628651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29820252.

The product of its digits is 23040, while the sum is 35.

The square root of 1222628651 is about 34966.1071753777. The cubic root of 1222628651 is about 1069.2966090699.

The spelling of 1222628651 in words is "one billion, two hundred twenty-two million, six hundred twenty-eight thousand, six hundred fifty-one".