213124284 has 60 divisors (see below), whose sum is σ = 566643000. Its totient is φ = 69831072.

The previous prime is 213124271. The next prime is 213124309. The reversal of 213124284 is 482421312.

213124284 is nontrivially palindromic in base 16.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13542 + ... + 24690.

It is an arithmetic number, because the mean of its divisors is an integer number (9444050).

Almost surely, 2^213124284 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 213124284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283321500).

213124284 is an abundant number, since it is smaller than the sum of its proper divisors (353518716).

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

213124284 is a wasteful number, since it uses less digits than its factorization.

213124284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224 (or 11213 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 213124284 is about 14598.7767980746. The cubic root of 213124284 is about 597.3253951975.

Adding to 213124284 its reverse (482421312), we get a palindrome (695545596).

The spelling of 213124284 in words is "two hundred thirteen million, one hundred twenty-four thousand, two hundred eighty-four".