55530133 has 2 divisors, whose sum is σ = 55530134. Its totient is φ = 55530132.

The previous prime is 55530107. The next prime is 55530149. The reversal of 55530133 is 33103555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53333809 + 2196324 = 7303^2 + 1482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55530133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55530098 and 55530107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55530173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765066 + 27765067.

It is an arithmetic number, because the mean of its divisors is an integer number (27765067).

Almost surely, 2^55530133 is an apocalyptic number.

It is an amenable number.

55530133 is a deficient number, since it is larger than the sum of its proper divisors (1).

55530133 is an equidigital number, since it uses as much as digits as its factorization.

55530133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 25.

The square root of 55530133 is about 7451.8543329832. The cubic root of 55530133 is about 381.5132021813.

Adding to 55530133 its reverse (33103555), we get a palindrome (88633688).

The spelling of 55530133 in words is "fifty-five million, five hundred thirty thousand, one hundred thirty-three".