55445133 has 16 divisors (see below), whose sum is σ = 74877696. Its totient is φ = 36491520.

The previous prime is 55445119. The next prime is 55445141. The reversal of 55445133 is 33154455.

It is not a de Polignac number, because 55445133 - 2⁶ = 55445069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55445133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55445333) 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, 128428 + ... + 128858.

It is an arithmetic number, because the mean of its divisors is an integer number (4679856).

Almost surely, 2^55445133 is an apocalyptic number.

It is an amenable number.

55445133 is a deficient number, since it is larger than the sum of its proper divisors (19432563).

55445133 is a wasteful number, since it uses less digits than its factorization.

55445133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its digits is 18000, while the sum is 30.

The square root of 55445133 is about 7446.1488703893. The cubic root of 55445133 is about 381.3184419632.

Adding to 55445133 its reverse (33154455), we get a palindrome (88599588).

The spelling of 55445133 in words is "fifty-five million, four hundred forty-five thousand, one hundred thirty-three".