55783312 has 20 divisors (see below), whose sum is σ = 116394460. Its totient is φ = 25746048.

The previous prime is 55783289. The next prime is 55783319. The reversal of 55783312 is 21338755.

55783312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35569296 + 20214016 = 5964^2 + 4496^2 .

It is a super-2 number, since 2×55783312² = 6223555795378688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55783319) 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 3 ways as a sum of consecutive naturals, for example, 133887 + ... + 134302.

It is an arithmetic number, because the mean of its divisors is an integer number (5819723).

Almost surely, 2^55783312 is an apocalyptic number.

55783312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

55783312 is an abundant number, since it is smaller than the sum of its proper divisors (60611148).

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

55783312 is a wasteful number, since it uses less digits than its factorization.

55783312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268210 (or 268204 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 55783312 is about 7468.8226649185. The cubic root of 55783312 is about 382.0921353374.

The spelling of 55783312 in words is "fifty-five million, seven hundred eighty-three thousand, three hundred twelve".