22447481 has 4 divisors (see below), whose sum is σ = 25654272. Its totient is φ = 19240692.

The previous prime is 22447457. The next prime is 22447483. The reversal of 22447481 is 18474422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22447481 - 2¹⁸ = 22185337 is a prime.

It is a super-2 number, since 2×22447481² = 1007778806490722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22447483) 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 3 ways as a sum of consecutive naturals, for example, 1603385 + ... + 1603398.

It is an arithmetic number, because the mean of its divisors is an integer number (6413568).

Almost surely, 2^22447481 is an apocalyptic number.

It is an amenable number.

22447481 is a deficient number, since it is larger than the sum of its proper divisors (3206791).

22447481 is an equidigital number, since it uses as much as digits as its factorization.

22447481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206790.

The product of its digits is 14336, while the sum is 32.

The square root of 22447481 is about 4737.8772673002. The cubic root of 22447481 is about 282.0909829994.

The spelling of 22447481 in words is "twenty-two million, four hundred forty-seven thousand, four hundred eighty-one".