22111387 has 2 divisors, whose sum is σ = 22111388. Its totient is φ = 22111386.

The previous prime is 22111363. The next prime is 22111393. The reversal of 22111387 is 78311122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22111387 - 2¹⁵ = 22078619 is a prime.

It is not a weakly prime, because it can be changed into another prime (22111357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055693 + 11055694.

It is an arithmetic number, because the mean of its divisors is an integer number (11055694).

Almost surely, 2^22111387 is an apocalyptic number.

22111387 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111387 is an equidigital number, since it uses as much as digits as its factorization.

22111387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 22111387 is about 4702.2746623310. The cubic root of 22111387 is about 280.6760322897.

The spelling of 22111387 in words is "twenty-two million, one hundred eleven thousand, three hundred eighty-seven".