43664051 has 8 divisors (see below), whose sum is σ = 45702144. Its totient is φ = 41637640.

The previous prime is 43664009. The next prime is 43664063. The reversal of 43664051 is 15046634.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 43664051 - 2¹⁰ = 43663027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43664351) 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, 5246 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (5712768).

Almost surely, 2^43664051 is an apocalyptic number.

43664051 is a deficient number, since it is larger than the sum of its proper divisors (2038093).

43664051 is a wasteful number, since it uses less digits than its factorization.

43664051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 43664051 is about 6607.8779498414. The cubic root of 43664051 is about 352.1340393233.

The spelling of 43664051 in words is "forty-three million, six hundred sixty-four thousand, fifty-one".