22219877 has 2 divisors, whose sum is σ = 22219878. Its totient is φ = 22219876.

The previous prime is 22219871. The next prime is 22219891. The reversal of 22219877 is 77891222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 73441 = 4706^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 22219877 - 2¹⁰ = 22218853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22219877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22219871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109938 + 11109939.

It is an arithmetic number, because the mean of its divisors is an integer number (11109939).

Almost surely, 2^22219877 is an apocalyptic number.

It is an amenable number.

22219877 is a deficient number, since it is larger than the sum of its proper divisors (1).

22219877 is an equidigital number, since it uses as much as digits as its factorization.

22219877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 22219877 is about 4713.7964529665. The cubic root of 22219877 is about 281.1343312342.

The spelling of 22219877 in words is "twenty-two million, two hundred nineteen thousand, eight hundred seventy-seven".