213810534 has 192 divisors, whose sum is σ = 597442560. Its totient is φ = 53887680.

The previous prime is 213810521. The next prime is 213810539. The reversal of 213810534 is 435018312.

It is a happy number.

It is a super-4 number, since 4×213810534⁴ (a number of 34 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213810498 and 213810507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213810539) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3191169 + ... + 3191235.

It is an arithmetic number, because the mean of its divisors is an integer number (3111680).

Almost surely, 2^213810534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213810534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298721280).

213810534 is an abundant number, since it is smaller than the sum of its proper divisors (383632026).

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

213810534 is a wasteful number, since it uses less digits than its factorization.

213810534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 213810534 is about 14622.2615897815. The cubic root of 213810534 is about 597.9658280343.

Adding to 213810534 its reverse (435018312), we get a palindrome (648828846).

The spelling of 213810534 in words is "two hundred thirteen million, eight hundred ten thousand, five hundred thirty-four".