213230440 has 16 divisors (see below), whose sum is σ = 479768580. Its totient is φ = 85292160.

The previous prime is 213230419. The next prime is 213230449. The reversal of 213230440 is 44032312.

213230440 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 206037316 + 7193124 = 14354^2 + 2682^2 .

It is not an unprimeable number, because it can be changed into a prime (213230449) 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, 2665341 + ... + 2665420.

Almost surely, 2^213230440 is an apocalyptic number.

213230440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213230440 is an abundant number, since it is smaller than the sum of its proper divisors (266538140).

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

213230440 is a wasteful number, since it uses less digits than its factorization.

213230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330772 (or 5330768 counting only the distinct ones).

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

The square root of 213230440 is about 14602.4121295079. The cubic root of 213230440 is about 597.4245535358.

Adding to 213230440 its reverse (44032312), we get a palindrome (257262752).

The spelling of 213230440 in words is "two hundred thirteen million, two hundred thirty thousand, four hundred forty".