213871224 has 64 divisors (see below), whose sum is σ = 621446400. Its totient is φ = 60067584.

The previous prime is 213871199. The next prime is 213871247. The reversal of 213871224 is 422178312.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213871191 and 213871200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877 + ... + 20700.

It is an arithmetic number, because the mean of its divisors is an integer number (9710100).

Almost surely, 2^213871224 is an apocalyptic number.

213871224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213871224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310723200).

213871224 is an abundant number, since it is smaller than the sum of its proper divisors (407575176).

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

213871224 is a wasteful number, since it uses less digits than its factorization.

213871224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21652 (or 21648 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 213871224 is about 14624.3367029072. The cubic root of 213871224 is about 598.0224001035.

The spelling of 213871224 in words is "two hundred thirteen million, eight hundred seventy-one thousand, two hundred twenty-four".