22961381 has 2 divisors, whose sum is σ = 22961382. Its totient is φ = 22961380.

The previous prime is 22961363. The next prime is 22961387. The reversal of 22961381 is 18316922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 2076481 = 4570^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 22961381 - 2⁶ = 22961317 is a prime.

It is a super-2 number, since 2×22961381² = 1054450034854322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22961387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11480690 + 11480691.

It is an arithmetic number, because the mean of its divisors is an integer number (11480691).

Almost surely, 2^22961381 is an apocalyptic number.

It is an amenable number.

22961381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22961381 is an equidigital number, since it uses as much as digits as its factorization.

22961381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 22961381 is about 4791.8035226833. The cubic root of 22961381 is about 284.2274388168.

The spelling of 22961381 in words is "twenty-two million, nine hundred sixty-one thousand, three hundred eighty-one".