43221481 has 4 divisors (see below), whose sum is σ = 43412112. Its totient is φ = 43030852.

The previous prime is 43221469. The next prime is 43221487. The reversal of 43221481 is 18412234.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18412234 = 2 ⋅9206117.

It is a cyclic number.

It is not a de Polignac number, because 43221481 - 2⁵ = 43221449 is a prime.

It is a super-2 number, since 2×43221481² = 3736192839666722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43221487) 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, 94975 + ... + 95428.

It is an arithmetic number, because the mean of its divisors is an integer number (10853028).

Almost surely, 2^43221481 is an apocalyptic number.

It is an amenable number.

43221481 is a deficient number, since it is larger than the sum of its proper divisors (190631).

43221481 is a wasteful number, since it uses less digits than its factorization.

43221481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190630.

The product of its digits is 1536, while the sum is 25.

The square root of 43221481 is about 6574.3046020092. The cubic root of 43221481 is about 350.9402771199.

The spelling of 43221481 in words is "forty-three million, two hundred twenty-one thousand, four hundred eighty-one".