222320129 has 4 divisors (see below), whose sum is σ = 222437076. Its totient is φ = 222203184.

The previous prime is 222320029. The next prime is 222320167. The reversal of 222320129 is 921023222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186595600 + 35724529 = 13660^2 + 5977^2 .

It is a cyclic number.

It is not a de Polignac number, because 222320129 - 2⁸ = 222319873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222320179) 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, 55574 + ... + 59439.

It is an arithmetic number, because the mean of its divisors is an integer number (55609269).

Almost surely, 2^222320129 is an apocalyptic number.

It is an amenable number.

222320129 is a deficient number, since it is larger than the sum of its proper divisors (116947).

222320129 is a wasteful number, since it uses less digits than its factorization.

222320129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116946.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 222320129 is about 14910.4033815320. The cubic root of 222320129 is about 605.7958054278.

The spelling of 222320129 in words is "two hundred twenty-two million, three hundred twenty thousand, one hundred twenty-nine".