22747481 has 2 divisors, whose sum is σ = 22747482. Its totient is φ = 22747480.

The previous prime is 22747463. The next prime is 22747511. The reversal of 22747481 is 18474722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22477081 + 270400 = 4741^2 + 520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22747481 is a prime.

It is a super-2 number, since 2×22747481² = 1034895783690722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22740481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11373740 + 11373741.

It is an arithmetic number, because the mean of its divisors is an integer number (11373741).

Almost surely, 2^22747481 is an apocalyptic number.

It is an amenable number.

22747481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22747481 is an equidigital number, since it uses as much as digits as its factorization.

22747481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 35.

The square root of 22747481 is about 4769.4319368243. The cubic root of 22747481 is about 283.3420969223.

The spelling of 22747481 in words is "twenty-two million, seven hundred forty-seven thousand, four hundred eighty-one".