22153909 has 2 divisors, whose sum is σ = 22153910. Its totient is φ = 22153908.

The previous prime is 22153903. The next prime is 22153921. The reversal of 22153909 is 90935122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 1876900 = 4503^2 + 1370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22153909 is a prime.

It is equal to p_1398316 and since 22153909 and 1398316 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22153903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11076954 + 11076955.

It is an arithmetic number, because the mean of its divisors is an integer number (11076955).

Almost surely, 2^22153909 is an apocalyptic number.

It is an amenable number.

22153909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22153909 is an equidigital number, since it uses as much as digits as its factorization.

22153909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 22153909 is about 4706.7939194318. The cubic root of 22153909 is about 280.8558380433.

The spelling of 22153909 in words is "twenty-two million, one hundred fifty-three thousand, nine hundred nine".