1229305217 has 16 divisors (see below), whose sum is σ = 1452441600. Its totient is φ = 1018152720.

The previous prime is 1229305211. The next prime is 1229305229. The reversal of 1229305217 is 7125039221.

It is a cyclic number.

It is not a de Polignac number, because 1229305217 - 2⁸ = 1229304961 is a prime.

It is a super-2 number, since 2×1229305217² = 3022382633086834178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229305211) 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 15 ways as a sum of consecutive naturals, for example, 152084 + ... + 159962.

It is an arithmetic number, because the mean of its divisors is an integer number (90777600).

Almost surely, 2^1229305217 is an apocalyptic number.

It is an amenable number.

1229305217 is a deficient number, since it is larger than the sum of its proper divisors (223136383).

1229305217 is an equidigital number, since it uses as much as digits as its factorization.

1229305217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1229305217 is about 35061.4491571584. The cubic root of 1229305217 is about 1071.2394920786.

The spelling of 1229305217 in words is "one billion, two hundred twenty-nine million, three hundred five thousand, two hundred seventeen".