55540133 has 16 divisors (see below), whose sum is σ = 64152000. Its totient is φ = 47604480.

The previous prime is 55540123. The next prime is 55540159. The reversal of 55540133 is 33104555.

It is not a de Polignac number, because 55540133 - 2⁸ = 55539877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55540103) 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, 11693 + ... + 15741.

It is an arithmetic number, because the mean of its divisors is an integer number (4009500).

Almost surely, 2^55540133 is an apocalyptic number.

It is an amenable number.

55540133 is a deficient number, since it is larger than the sum of its proper divisors (8611867).

55540133 is a wasteful number, since it uses less digits than its factorization.

55540133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 55540133 is about 7452.5252767099. The cubic root of 55540133 is about 381.5361020786.

Adding to 55540133 its reverse (33104555), we get a palindrome (88644688).

The spelling of 55540133 in words is "fifty-five million, five hundred forty thousand, one hundred thirty-three".