22420281 has 16 divisors (see below), whose sum is σ = 32389056. Its totient is φ = 13713216.

The previous prime is 22420267. The next prime is 22420291. The reversal of 22420281 is 18202422.

It is a happy number.

It is not a de Polignac number, because 22420281 - 2⁵ = 22420249 is a prime.

It is a super-2 number, since 2×22420281² = 1005338000237922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22420201) 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 in 15 ways as a sum of consecutive naturals, for example, 5086 + ... + 8408.

It is an arithmetic number, because the mean of its divisors is an integer number (2024316).

Almost surely, 2^22420281 is an apocalyptic number.

It is an amenable number.

22420281 is a deficient number, since it is larger than the sum of its proper divisors (9968775).

22420281 is a wasteful number, since it uses less digits than its factorization.

22420281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 22420281 is about 4735.0059134071. The cubic root of 22420281 is about 281.9769987779.

The spelling of 22420281 in words is "twenty-two million, four hundred twenty thousand, two hundred eighty-one".