22201381 has 2 divisors, whose sum is σ = 22201382. Its totient is φ = 22201380.

The previous prime is 22201349. The next prime is 22201391. The reversal of 22201381 is 18310222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 6081156 = 4015^2 + 2466^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201381 - 2⁵ = 22201349 is a prime.

It is a super-2 number, since 2×22201381² = 985802636614322, 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 (22201331) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100690 + 11100691.

It is an arithmetic number, because the mean of its divisors is an integer number (11100691).

Almost surely, 2^22201381 is an apocalyptic number.

It is an amenable number.

22201381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201381 is an equidigital number, since it uses as much as digits as its factorization.

22201381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22201381 is about 4711.8341439401. The cubic root of 22201381 is about 281.0563034386.

The spelling of 22201381 in words is "twenty-two million, two hundred one thousand, three hundred eighty-one".