22437481 has 4 divisors (see below), whose sum is σ = 24477264. Its totient is φ = 20397700.

The previous prime is 22437479. The next prime is 22437487. The reversal of 22437481 is 18473422.

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 22437481 - 2¹ = 22437479 is a prime.

It is a super-2 number, since 2×22437481² = 1006881107250722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22437487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019875 + ... + 1019896.

It is an arithmetic number, because the mean of its divisors is an integer number (6119316).

Almost surely, 2^22437481 is an apocalyptic number.

It is an amenable number.

22437481 is a deficient number, since it is larger than the sum of its proper divisors (2039783).

22437481 is a wasteful number, since it uses less digits than its factorization.

22437481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039782.

The product of its digits is 10752, while the sum is 31.

The square root of 22437481 is about 4736.8218248104. The cubic root of 22437481 is about 282.0490877444.

The spelling of 22437481 in words is "twenty-two million, four hundred thirty-seven thousand, four hundred eighty-one".