213533340 has 48 divisors (see below), whose sum is σ = 600542880. Its totient is φ = 56689920.

The previous prime is 213533297. The next prime is 213533377. The reversal of 213533340 is 43335312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 213533340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5970 + ... + 21510.

It is an arithmetic number, because the mean of its divisors is an integer number (12511310).

Almost surely, 2^213533340 is an apocalyptic number.

213533340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213533340 is an abundant number, since it is smaller than the sum of its proper divisors (387009540).

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

213533340 is a wasteful number, since it uses less digits than its factorization.

213533340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15782 (or 15780 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 213533340 is about 14612.7800229799. The cubic root of 213533340 is about 597.7073059711.

Adding to 213533340 its reverse (43335312), we get a palindrome (256868652).

The spelling of 213533340 in words is "two hundred thirteen million, five hundred thirty-three thousand, three hundred forty".