55393133 has 2 divisors, whose sum is σ = 55393134. Its totient is φ = 55393132.

The previous prime is 55393099. The next prime is 55393171. The reversal of 55393133 is 33139355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48622729 + 6770404 = 6973^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 55393133 - 2¹⁰ = 55392109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55393133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55393183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27696566 + 27696567.

It is an arithmetic number, because the mean of its divisors is an integer number (27696567).

Almost surely, 2^55393133 is an apocalyptic number.

It is an amenable number.

55393133 is a deficient number, since it is larger than the sum of its proper divisors (1).

55393133 is an equidigital number, since it uses as much as digits as its factorization.

55393133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18225, while the sum is 32.

The square root of 55393133 is about 7442.6563134408. The cubic root of 55393133 is about 381.1991963837.

The spelling of 55393133 in words is "fifty-five million, three hundred ninety-three thousand, one hundred thirty-three".