43540164 has 36 divisors (see below), whose sum is σ = 110295276. Its totient is φ = 14482368.

The previous prime is 43540163. The next prime is 43540177. The reversal of 43540164 is 46104534.

It can be written as a sum of positive squares in 2 ways, for example, as 3090564 + 40449600 = 1758^2 + 6360^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×43540164² = 3791491762293792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43540163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21082 + ... + 23054.

Almost surely, 2^43540164 is an apocalyptic number.

It is an amenable number.

43540164 is an abundant number, since it is smaller than the sum of its proper divisors (66755112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43540164 is a wasteful number, since it uses less digits than its factorization.

43540164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 43540164 is about 6598.4971016134. The cubic root of 43540164 is about 351.8006899396.

Adding to 43540164 its reverse (46104534), we get a palindrome (89644698).

The spelling of 43540164 in words is "forty-three million, five hundred forty thousand, one hundred sixty-four".