213320440 has 16 divisors (see below), whose sum is σ = 479971080. Its totient is φ = 85328160.

The previous prime is 213320413. The next prime is 213320441. The reversal of 213320440 is 44023312.

213320440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213320440² = 91011220243587200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213320441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666466 + ... + 2666545.

Almost surely, 2^213320440 is an apocalyptic number.

213320440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213320440 is an abundant number, since it is smaller than the sum of its proper divisors (266650640).

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

213320440 is a wasteful number, since it uses less digits than its factorization.

213320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333022 (or 5333018 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 213320440 is about 14605.4934870411. The cubic root of 213320440 is about 597.5085950807.

Adding to 213320440 its reverse (44023312), we get a palindrome (257343752).

The spelling of 213320440 in words is "two hundred thirteen million, three hundred twenty thousand, four hundred forty".