55040043 has 16 divisors (see below), whose sum is σ = 75689856. Its totient is φ = 35555520.

The previous prime is 55039991. The next prime is 55040059. The reversal of 55040043 is 34004055.

It is a happy number.

It is not a de Polignac number, because 55040043 - 2¹² = 55035947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55040743) 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, 15271 + ... + 18527.

It is an arithmetic number, because the mean of its divisors is an integer number (4730616).

Almost surely, 2^55040043 is an apocalyptic number.

55040043 is a deficient number, since it is larger than the sum of its proper divisors (20649813).

55040043 is a wasteful number, since it uses less digits than its factorization.

55040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 55040043 is about 7418.8976944018. The cubic root of 55040043 is about 380.3875155815.

Adding to 55040043 its reverse (34004055), we get a palindrome (89044098).

The spelling of 55040043 in words is "fifty-five million, forty thousand, forty-three".