22221799 has 2 divisors, whose sum is σ = 22221800. Its totient is φ = 22221798.

The previous prime is 22221781. The next prime is 22221817. The reversal of 22221799 is 99712222.

It is a balanced prime because it is at equal distance from previous prime (22221781) and next prime (22221817).

It is a cyclic number.

It is not a de Polignac number, because 22221799 - 2⁵ = 22221767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110899 + 11110900.

It is an arithmetic number, because the mean of its divisors is an integer number (11110900).

Almost surely, 2^22221799 is an apocalyptic number.

22221799 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221799 is an equidigital number, since it uses as much as digits as its factorization.

22221799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 22221799 is about 4714.0003182011. Note that the first 3 decimals coincide. The cubic root of 22221799 is about 281.1424369587.

It can be divided in two parts, 2222 and 1799, that multiplied together give a triangular number (3997378 = T₂₈₂₇).

The spelling of 22221799 in words is "twenty-two million, two hundred twenty-one thousand, seven hundred ninety-nine".