43201649 has 4 divisors (see below), whose sum is σ = 45475440. Its totient is φ = 40927860.

The previous prime is 43201643. The next prime is 43201673. The reversal of 43201649 is 94610234.

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 43201649 - 2⁴ = 43201633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43201643) 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, 1136867 + ... + 1136904.

It is an arithmetic number, because the mean of its divisors is an integer number (11368860).

Almost surely, 2^43201649 is an apocalyptic number.

It is an amenable number.

43201649 is a deficient number, since it is larger than the sum of its proper divisors (2273791).

43201649 is a wasteful number, since it uses less digits than its factorization.

43201649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273790.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 43201649 is about 6572.7961325451. The cubic root of 43201649 is about 350.8865930706.

The spelling of 43201649 in words is "forty-three million, two hundred one thousand, six hundred forty-nine".