22757381 has 2 divisors, whose sum is σ = 22757382. Its totient is φ = 22757380.

The previous prime is 22757351. The next prime is 22757387. The reversal of 22757381 is 18375722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16532356 + 6225025 = 4066^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 22757381 - 2¹⁸ = 22495237 is a prime.

It is a super-2 number, since 2×22757381² = 1035796779958322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22757387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11378690 + 11378691.

It is an arithmetic number, because the mean of its divisors is an integer number (11378691).

Almost surely, 2^22757381 is an apocalyptic number.

It is an amenable number.

22757381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22757381 is an equidigital number, since it uses as much as digits as its factorization.

22757381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 22757381 is about 4770.4696833750. The cubic root of 22757381 is about 283.3831956843.

The spelling of 22757381 in words is "twenty-two million, seven hundred fifty-seven thousand, three hundred eighty-one".