213284812860 has 144 divisors (see below), whose sum is σ = 745931100096. Its totient is φ = 48319358976.

The previous prime is 213284812849. The next prime is 213284812889. The reversal of 213284812860 is 68218482312.

213284812860 is a `hidden beast` number, since 2 + 1 + 328 + 48 + 1 + 286 + 0 = 666.

213284812860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213284812860² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 606619 + ... + 891378.

It is an arithmetic number, because the mean of its divisors is an integer number (5180077084).

Almost surely, 2^213284812860 is an apocalyptic number.

213284812860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213284812860 is an abundant number, since it is smaller than the sum of its proper divisors (532646287236).

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

213284812860 is a wasteful number, since it uses less digits than its factorization.

213284812860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498132 (or 1498127 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 213284812860 in words is "two hundred thirteen billion, two hundred eighty-four million, eight hundred twelve thousand, eight hundred sixty".