55212186312 has 96 divisors (see below), whose sum is σ = 153900583200. Its totient is φ = 17874037248.

The previous prime is 55212186299. The next prime is 55212186353. The reversal of 55212186312 is 21368121255.

55212186312 is a `hidden beast` number, since 5 + 5 + 2 + 1 + 2 + 18 + 631 + 2 = 666.

It is a super-2 number, since 2×55212186312² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274288 + ... + 430880.

It is an arithmetic number, because the mean of its divisors is an integer number (1603131075).

Almost surely, 2^55212186312 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 55212186312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76950291600).

55212186312 is an abundant number, since it is smaller than the sum of its proper divisors (98688396888).

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

55212186312 is a wasteful number, since it uses less digits than its factorization.

55212186312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156747 (or 156740 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 55212186312 in words is "fifty-five billion, two hundred twelve million, one hundred eighty-six thousand, three hundred twelve".