55306512216 has 192 divisors, whose sum is σ = 167444690400. Its totient is φ = 16388849664.

The previous prime is 55306512211. The next prime is 55306512227. The reversal of 55306512216 is 61221560355.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55306512211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8206000 + ... + 8212736.

Almost surely, 2^55306512216 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 55306512216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83722345200).

55306512216 is an abundant number, since it is smaller than the sum of its proper divisors (112138178184).

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

55306512216 is a wasteful number, since it uses less digits than its factorization.

55306512216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138 (or 7131 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 55306512216 in words is "fifty-five billion, three hundred six million, five hundred twelve thousand, two hundred sixteen".