55520330 has 16 divisors (see below), whose sum is σ = 100172160. Its totient is φ = 22155792.

The previous prime is 55520329. The next prime is 55520383. The reversal of 55520330 is 3302555.

It is a happy number.

55520330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55520296 and 55520305.

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, 1934 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (6260760).

Almost surely, 2^55520330 is an apocalyptic number.

55520330 is a deficient number, since it is larger than the sum of its proper divisors (44651830).

55520330 is a wasteful number, since it uses less digits than its factorization.

55520330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13093.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 55520330 is about 7451.1965482062. The cubic root of 55520330 is about 381.4907507433.

Adding to 55520330 its reverse (3302555), we get a palindrome (58822885).

The spelling of 55520330 in words is "fifty-five million, five hundred twenty thousand, three hundred thirty".