22149481 has 4 divisors (see below), whose sum is σ = 22173264. Its totient is φ = 22125700.

The previous prime is 22149461. The next prime is 22149493. The reversal of 22149481 is 18494122.

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 22149481 - 2⁷ = 22149353 is a prime.

It is a super-2 number, since 2×22149481² = 981199017138722, 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 (22149431) 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, 10435 + ... + 12376.

It is an arithmetic number, because the mean of its divisors is an integer number (5543316).

Almost surely, 2^22149481 is an apocalyptic number.

It is an amenable number.

22149481 is a deficient number, since it is larger than the sum of its proper divisors (23783).

22149481 is an equidigital number, since it uses as much as digits as its factorization.

22149481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23782.

The product of its digits is 4608, while the sum is 31.

The square root of 22149481 is about 4706.3235120421. The cubic root of 22149481 is about 280.8371248293.

The spelling of 22149481 in words is "twenty-two million, one hundred forty-nine thousand, four hundred eighty-one".