213140244 has 24 divisors (see below), whose sum is σ = 497689920. Its totient is φ = 70994944.

The previous prime is 213140243. The next prime is 213140251. The reversal of 213140244 is 442041312.

It is a super-2 number, since 2×213140244² = 90857527224759072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213140244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213140243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012 + ... + 24404.

It is an arithmetic number, because the mean of its divisors is an integer number (20737080).

Almost surely, 2^213140244 is an apocalyptic number.

It is an amenable number.

213140244 is an abundant number, since it is smaller than the sum of its proper divisors (284549676).

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

213140244 is a wasteful number, since it uses less digits than its factorization.

213140244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12959 (or 12957 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 213140244 is about 14599.3234089803. The cubic root of 213140244 is about 597.3403052383.

Adding to 213140244 its reverse (442041312), we get a palindrome (655181556).

The spelling of 213140244 in words is "two hundred thirteen million, one hundred forty thousand, two hundred forty-four".