43446021 has 8 divisors (see below), whose sum is σ = 57980640. Its totient is φ = 28937712.

The previous prime is 43446017. The next prime is 43446041. The reversal of 43446021 is 12064434.

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

It is not a de Polignac number, because 43446021 - 2² = 43446017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43445982 and 43446000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43446041) 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, 2331 + ... + 9608.

It is an arithmetic number, because the mean of its divisors is an integer number (7247580).

Almost surely, 2^43446021 is an apocalyptic number.

It is an amenable number.

43446021 is a deficient number, since it is larger than the sum of its proper divisors (14534619).

43446021 is a wasteful number, since it uses less digits than its factorization.

43446021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13155.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 43446021 is about 6591.3595714390. The cubic root of 43446021 is about 351.5469512570.

The spelling of 43446021 in words is "forty-three million, four hundred forty-six thousand, twenty-one".