222391409 has 4 divisors (see below), whose sum is σ = 234096240. Its totient is φ = 210686580.

The previous prime is 222391397. The next prime is 222391417. The reversal of 222391409 is 904193222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222391409 - 2²⁴ = 205614193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222391109) 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 3 ways as a sum of consecutive naturals, for example, 5852387 + ... + 5852424.

It is an arithmetic number, because the mean of its divisors is an integer number (58524060).

Almost surely, 2^222391409 is an apocalyptic number.

It is an amenable number.

222391409 is a deficient number, since it is larger than the sum of its proper divisors (11704831).

222391409 is a wasteful number, since it uses less digits than its factorization.

222391409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11704830.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 222391409 is about 14912.7934673555. The cubic root of 222391409 is about 605.8605416727.

The spelling of 222391409 in words is "two hundred twenty-two million, three hundred ninety-one thousand, four hundred nine".