22198877 has 2 divisors, whose sum is σ = 22198878. Its totient is φ = 22198876.

The previous prime is 22198873. The next prime is 22198903. The reversal of 22198877 is 77889122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 52441 = 4706^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 22198877 - 2² = 22198873 is a prime.

It is a super-2 number, since 2×22198877² = 985580280122258, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22198873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11099438 + 11099439.

It is an arithmetic number, because the mean of its divisors is an integer number (11099439).

Almost surely, 2^22198877 is an apocalyptic number.

It is an amenable number.

22198877 is a deficient number, since it is larger than the sum of its proper divisors (1).

22198877 is an equidigital number, since it uses as much as digits as its factorization.

22198877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 44.

The square root of 22198877 is about 4711.5684225107. The cubic root of 22198877 is about 281.0457366568.

The spelling of 22198877 in words is "twenty-two million, one hundred ninety-eight thousand, eight hundred seventy-seven".