55321994 has 32 divisors (see below), whose sum is σ = 104522880. Its totient is φ = 21373632.

The previous prime is 55321991. The next prime is 55322009. The reversal of 55321994 is 49912355.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55321991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4292 + ... + 11360.

It is an arithmetic number, because the mean of its divisors is an integer number (3266340).

Almost surely, 2^55321994 is an apocalyptic number.

55321994 is a deficient number, since it is larger than the sum of its proper divisors (49200886).

55321994 is a wasteful number, since it uses less digits than its factorization.

55321994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134.

The product of its digits is 48600, while the sum is 38.

The square root of 55321994 is about 7437.8756375729. The cubic root of 55321994 is about 381.0359406073.

The spelling of 55321994 in words is "fifty-five million, three hundred twenty-one thousand, nine hundred ninety-four".