55213933 has 2 divisors, whose sum is σ = 55213934. Its totient is φ = 55213932.

The previous prime is 55213913. The next prime is 55213937. The reversal of 55213933 is 33931255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35259844 + 19954089 = 5938^2 + 4467^2 .

It is a cyclic number.

It is not a de Polignac number, because 55213933 - 2⁵ = 55213901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55213895 and 55213904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55213937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606966 + 27606967.

It is an arithmetic number, because the mean of its divisors is an integer number (27606967).

Almost surely, 2^55213933 is an apocalyptic number.

It is an amenable number.

55213933 is a deficient number, since it is larger than the sum of its proper divisors (1).

55213933 is an equidigital number, since it uses as much as digits as its factorization.

55213933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 31.

The square root of 55213933 is about 7430.6078486218. The cubic root of 55213933 is about 380.7876851355.

The spelling of 55213933 in words is "fifty-five million, two hundred thirteen thousand, nine hundred thirty-three".