22155201989 has 2 divisors, whose sum is σ = 22155201990. Its totient is φ = 22155201988.

The previous prime is 22155201983. The next prime is 22155202031. The reversal of 22155201989 is 98910255122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22146499489 + 8702500 = 148817^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155201989 - 2²⁸ = 21886766533 is a prime.

It is a super-2 number, since 2×22155201989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155201983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077600994 + 11077600995.

It is an arithmetic number, because the mean of its divisors is an integer number (11077600995).

Almost surely, 2^22155201989 is an apocalyptic number.

It is an amenable number.

22155201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155201989 is an equidigital number, since it uses as much as digits as its factorization.

22155201989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 22155201989 in words is "twenty-two billion, one hundred fifty-five million, two hundred one thousand, nine hundred eighty-nine".