222508409 has 2 divisors, whose sum is σ = 222508410. Its totient is φ = 222508408.

The previous prime is 222508399. The next prime is 222508441. The reversal of 222508409 is 904805222.

It is an a-pointer prime, because the next prime (222508441) can be obtained adding 222508409 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160098409 + 62410000 = 12653^2 + 7900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222508409 is a prime.

It is a super-2 number, since 2×222508409² = 99019984151422562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222508459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111254204 + 111254205.

It is an arithmetic number, because the mean of its divisors is an integer number (111254205).

Almost surely, 2^222508409 is an apocalyptic number.

It is an amenable number.

222508409 is a deficient number, since it is larger than the sum of its proper divisors (1).

222508409 is an equidigital number, since it uses as much as digits as its factorization.

222508409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 222508409 is about 14916.7157578336. The cubic root of 222508409 is about 605.9667706803.

The spelling of 222508409 in words is "two hundred twenty-two million, five hundred eight thousand, four hundred nine".