43523109 has 16 divisors (see below), whose sum is σ = 73690240. Its totient is φ = 24870240.

The previous prime is 43523089. The next prime is 43523131. The reversal of 43523109 is 90132534.

It is not a de Polignac number, because 43523109 - 2¹¹ = 43521061 is a prime.

It is a super-2 number, since 2×43523109² = 3788522034051762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43523159) 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, 114952 + ... + 115329.

It is an arithmetic number, because the mean of its divisors is an integer number (4605640).

Almost surely, 2^43523109 is an apocalyptic number.

It is an amenable number.

43523109 is a deficient number, since it is larger than the sum of its proper divisors (30167131).

43523109 is a wasteful number, since it uses less digits than its factorization.

43523109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230297 (or 230291 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 43523109 is about 6597.2046352982. The cubic root of 43523109 is about 351.7547496415.

The spelling of 43523109 in words is "forty-three million, five hundred twenty-three thousand, one hundred nine".