222809811 has 12 divisors (see below), whose sum is σ = 345582792. Its totient is φ = 127319808.

The previous prime is 222809791. The next prime is 222809833. The reversal of 222809811 is 118908222.

It is not a de Polignac number, because 222809811 - 2⁵ = 222809779 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (222809891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 757710 + ... + 758003.

It is an arithmetic number, because the mean of its divisors is an integer number (28798566).

Almost surely, 2^222809811 is an apocalyptic number.

222809811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

222809811 is a deficient number, since it is larger than the sum of its proper divisors (122772981).

222809811 is a wasteful number, since it uses less digits than its factorization.

222809811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515730 (or 1515723 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 222809811 is about 14926.8151660024. The cubic root of 222809811 is about 606.2402542664.

The spelling of 222809811 in words is "two hundred twenty-two million, eight hundred nine thousand, eight hundred eleven".