22372381 has 2 divisors, whose sum is σ = 22372382. Its totient is φ = 22372380.

The previous prime is 22372379. The next prime is 22372397. The reversal of 22372381 is 18327322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 5480281 = 4110^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 22372381 - 2¹ = 22372379 is a prime.

It is a super-2 number, since 2×22372381² = 1001046863218322, which contains 22 as substring.

Together with 22372379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22372681) 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, 11186190 + 11186191.

It is an arithmetic number, because the mean of its divisors is an integer number (11186191).

Almost surely, 2^22372381 is an apocalyptic number.

It is an amenable number.

22372381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22372381 is an equidigital number, since it uses as much as digits as its factorization.

22372381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 22372381 is about 4729.9451371025. The cubic root of 22372381 is about 281.7760448810.

The spelling of 22372381 in words is "twenty-two million, three hundred seventy-two thousand, three hundred eighty-one".