55821650 has 24 divisors (see below), whose sum is σ = 105087024. Its totient is φ = 22058000.

The previous prime is 55821643. The next prime is 55821671. The reversal of 55821650 is 5612855.

55821650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 2576 + ... + 10875.

It is an arithmetic number, because the mean of its divisors is an integer number (4378626).

Almost surely, 2^55821650 is an apocalyptic number.

55821650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55821650 is a deficient number, since it is larger than the sum of its proper divisors (49265374).

55821650 is a wasteful number, since it uses less digits than its factorization.

55821650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13546 (or 13541 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 55821650 is about 7471.3887597956. The cubic root of 55821650 is about 382.1796483301.

The spelling of 55821650 in words is "fifty-five million, eight hundred twenty-one thousand, six hundred fifty".