55040061 has 4 divisors (see below), whose sum is σ = 73386752. Its totient is φ = 36693372.

The previous prime is 55040059. The next prime is 55040071. The reversal of 55040061 is 16004055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55040061 - 2¹ = 55040059 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55040071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9173341 + ... + 9173346.

It is an arithmetic number, because the mean of its divisors is an integer number (18346688).

Almost surely, 2^55040061 is an apocalyptic number.

It is an amenable number.

55040061 is a deficient number, since it is larger than the sum of its proper divisors (18346691).

55040061 is a wasteful number, since it uses less digits than its factorization.

55040061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18346690.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55040061 is about 7418.8989075199. The cubic root of 55040061 is about 380.3875570481.

The spelling of 55040061 in words is "fifty-five million, forty thousand, sixty-one".