213005436 has 48 divisors (see below), whose sum is σ = 568732416. Its totient is φ = 60781824.

The previous prime is 213005431. The next prime is 213005449. The reversal of 213005436 is 634500312.

It is a happy number.

213005436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213005431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118980 + ... + 120756.

It is an arithmetic number, because the mean of its divisors is an integer number (11848592).

Almost surely, 2^213005436 is an apocalyptic number.

It is an amenable number.

213005436 is an abundant number, since it is smaller than the sum of its proper divisors (355726980).

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

213005436 is a wasteful number, since it uses less digits than its factorization.

213005436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 3216 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 213005436 is about 14594.7057524295. The cubic root of 213005436 is about 597.2143424238.

Adding to 213005436 its reverse (634500312), we get a palindrome (847505748).

The spelling of 213005436 in words is "two hundred thirteen million, five thousand, four hundred thirty-six".