55315232 has 96 divisors (see below), whose sum is σ = 134628480. Its totient is φ = 21841920.

The previous prime is 55315187. The next prime is 55315237. The reversal of 55315232 is 23251355.

It is not an unprimeable number, because it can be changed into a prime (55315237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174338 + ... + 174654.

It is an arithmetic number, because the mean of its divisors is an integer number (1402380).

Almost surely, 2^55315232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55315232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67314240).

55315232 is an abundant number, since it is smaller than the sum of its proper divisors (79313248).

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

55315232 is a wasteful number, since it uses less digits than its factorization.

55315232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 386 counting only the distinct ones).

The product of its digits is 4500, while the sum is 26.

The square root of 55315232 is about 7437.4210584046. The cubic root of 55315232 is about 381.0204153173.

Adding to 55315232 its reverse (23251355), we get a palindrome (78566587).

The spelling of 55315232 in words is "fifty-five million, three hundred fifteen thousand, two hundred thirty-two".