1222518229 has 16 divisors (see below), whose sum is σ = 1346181120. Its totient is φ = 1105027840.

The previous prime is 1222518211. The next prime is 1222518239. The reversal of 1222518229 is 9228152221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1222518229 - 2²⁷ = 1088300501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222518194 and 1222518203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222518239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87672 + ... + 100654.

It is an arithmetic number, because the mean of its divisors is an integer number (84136320).

Almost surely, 2^1222518229 is an apocalyptic number.

It is an amenable number.

1222518229 is a deficient number, since it is larger than the sum of its proper divisors (123662891).

1222518229 is a wasteful number, since it uses less digits than its factorization.

1222518229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220.

The product of its digits is 11520, while the sum is 34.

The square root of 1222518229 is about 34964.5281535444. The cubic root of 1222518229 is about 1069.2644168407.

The spelling of 1222518229 in words is "one billion, two hundred twenty-two million, five hundred eighteen thousand, two hundred twenty-nine".