55821054 has 16 divisors (see below), whose sum is σ = 114018048. Its totient is φ = 18211032.

The previous prime is 55821043. The next prime is 55821089. The reversal of 55821054 is 45012855.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98692 + ... + 99255.

It is an arithmetic number, because the mean of its divisors is an integer number (7126128).

Almost surely, 2^55821054 is an apocalyptic number.

55821054 is an abundant number, since it is smaller than the sum of its proper divisors (58196994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55821054 is a wasteful number, since it uses less digits than its factorization.

55821054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197999.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 55821054 is about 7471.3488741994. The cubic root of 55821054 is about 382.1782881655.

It can be divided in two parts, 558 and 21054, that added together give a palindrome (21612).

The spelling of 55821054 in words is "fifty-five million, eight hundred twenty-one thousand, fifty-four".