43220661 has 8 divisors (see below), whose sum is σ = 62866464. Its totient is φ = 26194320.

The previous prime is 43220659. The next prime is 43220669. The reversal of 43220661 is 16602234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43220661 - 2¹ = 43220659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43220669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654826 + ... + 654891.

It is an arithmetic number, because the mean of its divisors is an integer number (7858308).

Almost surely, 2^43220661 is an apocalyptic number.

It is an amenable number.

43220661 is a deficient number, since it is larger than the sum of its proper divisors (19645803).

43220661 is a wasteful number, since it uses less digits than its factorization.

43220661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309731.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 43220661 is about 6574.2422377031. The cubic root of 43220661 is about 350.9380577540.

Adding to 43220661 its reverse (16602234), we get a palindrome (59822895).

The spelling of 43220661 in words is "forty-three million, two hundred twenty thousand, six hundred sixty-one".