43539225 has 24 divisors (see below), whose sum is σ = 72173952. Its totient is φ = 23160000.

The previous prime is 43539187. The next prime is 43539257. The reversal of 43539225 is 52293534.

It is not a de Polignac number, because 43539225 - 2⁸ = 43538969 is a prime.

It is a super-2 number, since 2×43539225² = 3791328227201250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55939 + ... + 56711.

It is an arithmetic number, because the mean of its divisors is an integer number (3007248).

Almost surely, 2^43539225 is an apocalyptic number.

It is an amenable number.

43539225 is a deficient number, since it is larger than the sum of its proper divisors (28634727).

43539225 is a wasteful number, since it uses less digits than its factorization.

43539225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537 (or 1532 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The square root of 43539225 is about 6598.4259486638. The cubic root of 43539225 is about 351.7981609090.

The spelling of 43539225 in words is "forty-three million, five hundred thirty-nine thousand, two hundred twenty-five".