55531020 has 24 divisors (see below), whose sum is σ = 155487024. Its totient is φ = 14808256.

The previous prime is 55531009. The next prime is 55531033. The reversal of 55531020 is 2013555.

55531020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 462699 + ... + 462818.

It is an arithmetic number, because the mean of its divisors is an integer number (6478626).

Almost surely, 2^55531020 is an apocalyptic number.

It is an amenable number.

55531020 is an abundant number, since it is smaller than the sum of its proper divisors (99956004).

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

55531020 is a wasteful number, since it uses less digits than its factorization.

55531020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925529 (or 925527 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55531020 is about 7451.9138481332. The cubic root of 55531020 is about 381.5152335133.

Adding to 55531020 its reverse (2013555), we get a palindrome (57544575).

The spelling of 55531020 in words is "fifty-five million, five hundred thirty-one thousand, twenty".