22719091 has 2 divisors, whose sum is σ = 22719092. Its totient is φ = 22719090.

The previous prime is 22719013. The next prime is 22719113. The reversal of 22719091 is 19091722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22719091 - 2¹¹ = 22717043 is a prime.

It is not a weakly prime, because it can be changed into another prime (22719391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11359545 + 11359546.

It is an arithmetic number, because the mean of its divisors is an integer number (11359546).

Almost surely, 2^22719091 is an apocalyptic number.

22719091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22719091 is an equidigital number, since it uses as much as digits as its factorization.

22719091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 22719091 is about 4766.4547621896. The cubic root of 22719091 is about 283.2241727893.

The spelling of 22719091 in words is "twenty-two million, seven hundred nineteen thousand, ninety-one".