22978481 has 2 divisors, whose sum is σ = 22978482. Its totient is φ = 22978480.

The previous prime is 22978477. The next prime is 22978499. The reversal of 22978481 is 18487922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 7612081 = 3920^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 22978481 - 2² = 22978477 is a prime.

It is a super-2 number, since 2×22978481² = 1056021178134722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22978421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11489240 + 11489241.

It is an arithmetic number, because the mean of its divisors is an integer number (11489241).

Almost surely, 2^22978481 is an apocalyptic number.

It is an amenable number.

22978481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22978481 is an equidigital number, since it uses as much as digits as its factorization.

22978481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 22978481 is about 4793.5874874670. The cubic root of 22978481 is about 284.2979787547.

The spelling of 22978481 in words is "twenty-two million, nine hundred seventy-eight thousand, four hundred eighty-one".