22231789 has 2 divisors, whose sum is σ = 22231790. Its totient is φ = 22231788.

The previous prime is 22231787. The next prime is 22231861. The reversal of 22231789 is 98713222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 4338889 = 4230^2 + 2083^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231789 - 2¹ = 22231787 is a prime.

Together with 22231787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22231787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115894 + 11115895.

It is an arithmetic number, because the mean of its divisors is an integer number (11115895).

Almost surely, 2^22231789 is an apocalyptic number.

It is an amenable number.

22231789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231789 is an equidigital number, since it uses as much as digits as its factorization.

22231789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 22231789 is about 4715.0598087405. The cubic root of 22231789 is about 281.1845606435.

The spelling of 22231789 in words is "twenty-two million, two hundred thirty-one thousand, seven hundred eighty-nine".