43540155 has 24 divisors (see below), whose sum is σ = 77313600. Its totient is φ = 22654080.

The previous prime is 43540141. The next prime is 43540163. The reversal of 43540155 is 55104534.

It is not a de Polignac number, because 43540155 - 2¹¹ = 43538107 is a prime.

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, 9955 + ... + 13644.

It is an arithmetic number, because the mean of its divisors is an integer number (3221400).

Almost surely, 2^43540155 is an apocalyptic number.

43540155 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

43540155 is a deficient number, since it is larger than the sum of its proper divisors (33773445).

43540155 is a wasteful number, since it uses less digits than its factorization.

43540155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23651 (or 23648 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 43540155 is about 6598.4964196399. The cubic root of 43540155 is about 351.8006656999.

Adding to 43540155 its reverse (55104534), we get a palindrome (98644689).

The spelling of 43540155 in words is "forty-three million, five hundred forty thousand, one hundred fifty-five".