55840033 has 4 divisors (see below), whose sum is σ = 56195860. Its totient is φ = 55484208.

The previous prime is 55840027. The next prime is 55840061. The reversal of 55840033 is 33004855.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35617024 + 20223009 = 5968^2 + 4497^2 .

It is a cyclic number.

It is not a de Polignac number, because 55840033 - 2⁹ = 55839521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55839983 and 55840010.

It is not an unprimeable number, because it can be changed into a prime (55840003) 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, 177678 + ... + 177991.

It is an arithmetic number, because the mean of its divisors is an integer number (14048965).

Almost surely, 2^55840033 is an apocalyptic number.

It is an amenable number.

55840033 is a deficient number, since it is larger than the sum of its proper divisors (355827).

55840033 is a wasteful number, since it uses less digits than its factorization.

55840033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355826.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 55840033 is about 7472.6188849693. The cubic root of 55840033 is about 382.2215964356.

Adding to 55840033 its reverse (33004855), we get a palindrome (88844888).

The spelling of 55840033 in words is "fifty-five million, eight hundred forty thousand, thirty-three".