55321633 has 2 divisors, whose sum is σ = 55321634. Its totient is φ = 55321632.

The previous prime is 55321631. The next prime is 55321649. The reversal of 55321633 is 33612355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42419169 + 12902464 = 6513^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 55321633 - 2¹ = 55321631 is a prime.

Together with 55321631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55321631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27660816 + 27660817.

It is an arithmetic number, because the mean of its divisors is an integer number (27660817).

Almost surely, 2^55321633 is an apocalyptic number.

It is an amenable number.

55321633 is a deficient number, since it is larger than the sum of its proper divisors (1).

55321633 is an equidigital number, since it uses as much as digits as its factorization.

55321633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 28.

The square root of 55321633 is about 7437.8513698514. The cubic root of 55321633 is about 381.0351117973.

Adding to 55321633 its reverse (33612355), we get a palindrome (88933988).

The spelling of 55321633 in words is "fifty-five million, three hundred twenty-one thousand, six hundred thirty-three".