55615320 has 48 divisors (see below), whose sum is σ = 180750960. Its totient is φ = 14830656.

The previous prime is 55615319. The next prime is 55615321. The reversal of 55615320 is 2351655.

55615320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55615319) and next prime (55615321).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55615321) by changing a digit.

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, 76884 + ... + 77603.

It is an arithmetic number, because the mean of its divisors is an integer number (3765645).

Almost surely, 2^55615320 is an apocalyptic number.

It is an amenable number.

55615320 is an abundant number, since it is smaller than the sum of its proper divisors (125135640).

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

55615320 is a wasteful number, since it uses less digits than its factorization.

55615320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154504 (or 154497 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55615320 is about 7457.5679681784. The cubic root of 55615320 is about 381.7081915711.

Adding to 55615320 its reverse (2351655), we get a palindrome (57966975).

It can be divided in two parts, 556 and 15320, that added together give a square (15876 = 126²).

The spelling of 55615320 in words is "fifty-five million, six hundred fifteen thousand, three hundred twenty".