55400533 has 2 divisors, whose sum is σ = 55400534. Its totient is φ = 55400532.

The previous prime is 55400509. The next prime is 55400539. The reversal of 55400533 is 33500455.

It is a happy number.

55400533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54272689 + 1127844 = 7367^2 + 1062^2 .

It is a cyclic number.

It is not a de Polignac number, because 55400533 - 2²⁵ = 21846101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55400498 and 55400507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55400539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700266 + 27700267.

It is an arithmetic number, because the mean of its divisors is an integer number (27700267).

Almost surely, 2^55400533 is an apocalyptic number.

It is an amenable number.

55400533 is a deficient number, since it is larger than the sum of its proper divisors (1).

55400533 is an equidigital number, since it uses as much as digits as its factorization.

55400533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 55400533 is about 7443.1534311742. The cubic root of 55400533 is about 381.2161705000.

Adding to 55400533 its reverse (33500455), we get a palindrome (88900988).

The spelling of 55400533 in words is "fifty-five million, four hundred thousand, five hundred thirty-three".