404422111 has 2 divisors, whose sum is σ = 404422112. Its totient is φ = 404422110.

The previous prime is 404422091. The next prime is 404422121. The reversal of 404422111 is 111224404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404422111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404422121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202211055 + 202211056.

It is an arithmetic number, because the mean of its divisors is an integer number (202211056).

Almost surely, 2^404422111 is an apocalyptic number.

404422111 is a deficient number, since it is larger than the sum of its proper divisors (1).

404422111 is an equidigital number, since it uses as much as digits as its factorization.

404422111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 404422111 is about 20110.2489044765. The cubic root of 404422111 is about 739.5115543406.

Adding to 404422111 its reverse (111224404), we get a palindrome (515646515).

The spelling of 404422111 in words is "four hundred four million, four hundred twenty-two thousand, one hundred eleven".