55561333 has 4 divisors (see below), whose sum is σ = 56071180. Its totient is φ = 55051488.

The previous prime is 55561313. The next prime is 55561349. The reversal of 55561333 is 33316555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33316555 = 5 ⋅6663311.

It can be written as a sum of positive squares in 2 ways, for example, as 46758244 + 8803089 = 6838^2 + 2967^2 .

It is a cyclic number.

It is not a de Polignac number, because 55561333 - 2¹⁷ = 55430261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55561295 and 55561304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561313) 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, 254760 + ... + 254977.

It is an arithmetic number, because the mean of its divisors is an integer number (14017795).

Almost surely, 2^55561333 is an apocalyptic number.

It is an amenable number.

55561333 is a deficient number, since it is larger than the sum of its proper divisors (509847).

55561333 is a wasteful number, since it uses less digits than its factorization.

55561333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509846.

The product of its digits is 20250, while the sum is 31.

The square root of 55561333 is about 7453.9474776792. The cubic root of 55561333 is about 381.5846407718.

Adding to 55561333 its reverse (33316555), we get a palindrome (88877888).

It can be divided in two parts, 5556 and 1333, that added together give a square (6889 = 83²).

The spelling of 55561333 in words is "fifty-five million, five hundred sixty-one thousand, three hundred thirty-three".