213335540 has 48 divisors (see below), whose sum is σ = 491387904. Its totient is φ = 77155200.

The previous prime is 213335539. The next prime is 213335569. The reversal of 213335540 is 45533312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39482 + ... + 44558.

It is an arithmetic number, because the mean of its divisors is an integer number (10237248).

Almost surely, 2^213335540 is an apocalyptic number.

213335540 is a gapful number since it is divisible by the number (20) 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 213335540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245693952).

213335540 is an abundant number, since it is smaller than the sum of its proper divisors (278052364).

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

213335540 is a wasteful number, since it uses less digits than its factorization.

213335540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288 (or 5286 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 213335540 is about 14606.0104066785. The cubic root of 213335540 is about 597.5226930685.

Adding to 213335540 its reverse (45533312), we get a palindrome (258868852).

It can be divided in two parts, 2133 and 35540, that added together give a palindrome (37673).

The spelling of 213335540 in words is "two hundred thirteen million, three hundred thirty-five thousand, five hundred forty".