22481887 has 2 divisors, whose sum is σ = 22481888. Its totient is φ = 22481886.

The previous prime is 22481831. The next prime is 22481897. The reversal of 22481887 is 78818422.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22481887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22481897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11240943 + 11240944.

It is an arithmetic number, because the mean of its divisors is an integer number (11240944).

Almost surely, 2^22481887 is an apocalyptic number.

22481887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22481887 is an equidigital number, since it uses as much as digits as its factorization.

22481887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 40.

The square root of 22481887 is about 4741.5068280031. The cubic root of 22481887 is about 282.2350328354.

The spelling of 22481887 in words is "twenty-two million, four hundred eighty-one thousand, eight hundred eighty-seven".