43536538 has 4 divisors (see below), whose sum is σ = 65304810. Its totient is φ = 21768268.

The previous prime is 43536517. The next prime is 43536551. The reversal of 43536538 is 83563534.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43520409 + 16129 = 6597^2 + 127^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43536497 and 43536506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10884133 + ... + 10884136.

Almost surely, 2^43536538 is an apocalyptic number.

43536538 is a deficient number, since it is larger than the sum of its proper divisors (21768272).

43536538 is a wasteful number, since it uses less digits than its factorization.

43536538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21768271.

The product of its digits is 129600, while the sum is 37.

The square root of 43536538 is about 6598.2223363570. Note that the first 3 decimals coincide. The cubic root of 43536538 is about 351.7909237483.

The spelling of 43536538 in words is "forty-three million, five hundred thirty-six thousand, five hundred thirty-eight".