55821022 has 8 divisors (see below), whose sum is σ = 83822256. Its totient is φ = 27880272.

The previous prime is 55821011. The next prime is 55821043. The reversal of 55821022 is 22012855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12738 + ... + 16549.

It is an arithmetic number, because the mean of its divisors is an integer number (10477782).

Almost surely, 2^55821022 is an apocalyptic number.

55821022 is a deficient number, since it is larger than the sum of its proper divisors (28001234).

55821022 is a wasteful number, since it uses less digits than its factorization.

55821022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30242.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 55821022 is about 7471.3467326848. The cubic root of 55821022 is about 382.1782151363.

Adding to 55821022 its reverse (22012855), we get a palindrome (77833877).

The spelling of 55821022 in words is "fifty-five million, eight hundred twenty-one thousand, twenty-two".