43522138 has 32 divisors (see below), whose sum is σ = 73893888. Its totient is φ = 19051200.

The previous prime is 43522133. The next prime is 43522153. The reversal of 43522138 is 83122534.

It is not an unprimeable number, because it can be changed into a prime (43522133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103168 + ... + 103588.

It is an arithmetic number, because the mean of its divisors is an integer number (2309184).

Almost surely, 2^43522138 is an apocalyptic number.

43522138 is a deficient number, since it is larger than the sum of its proper divisors (30371750).

43522138 is a wasteful number, since it uses less digits than its factorization.

43522138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its digits is 5760, while the sum is 28.

The square root of 43522138 is about 6597.1310431126. The cubic root of 43522138 is about 351.7521337407.

It can be divided in two parts, 43522 and 138, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 43522138 in words is "forty-three million, five hundred twenty-two thousand, one hundred thirty-eight".