55201312 has 72 divisors (see below), whose sum is σ = 118831104. Its totient is φ = 25224192.

The previous prime is 55201309. The next prime is 55201331. The reversal of 55201312 is 21310255.

It is a self number, because there is not a number n which added to its sum of digits gives 55201312.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434593 + ... + 434719.

It is an arithmetic number, because the mean of its divisors is an integer number (1650432).

Almost surely, 2^55201312 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 55201312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59415552).

55201312 is an abundant number, since it is smaller than the sum of its proper divisors (63629792).

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

55201312 is a wasteful number, since it uses less digits than its factorization.

55201312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55201312 is about 7429.7585425100. The cubic root of 55201312 is about 380.7586689836.

Adding to 55201312 its reverse (21310255), we get a palindrome (76511567).

The spelling of 55201312 in words is "fifty-five million, two hundred one thousand, three hundred twelve".