55545312 has 24 divisors (see below), whose sum is σ = 145806696. Its totient is φ = 18515072.

The previous prime is 55545289. The next prime is 55545323. The reversal of 55545312 is 21354555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55545312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289203 + ... + 289394.

It is an arithmetic number, because the mean of its divisors is an integer number (6075279).

Almost surely, 2^55545312 is an apocalyptic number.

It is an amenable number.

55545312 is an abundant number, since it is smaller than the sum of its proper divisors (90261384).

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

55545312 is a wasteful number, since it uses less digits than its factorization.

55545312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578610 (or 578602 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 55545312 is about 7452.8727347245. The cubic root of 55545312 is about 381.5479608550.

Adding to 55545312 its reverse (21354555), we get a palindrome (76899867).

The spelling of 55545312 in words is "fifty-five million, five hundred forty-five thousand, three hundred twelve".