213244340 has 24 divisors (see below), whose sum is σ = 448399392. Its totient is φ = 85186080.

The previous prime is 213244331. The next prime is 213244351. The reversal of 213244340 is 43442312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9647 + ... + 22793.

It is an arithmetic number, because the mean of its divisors is an integer number (18683308).

Almost surely, 2^213244340 is an apocalyptic number.

213244340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213244340 is an abundant number, since it is smaller than the sum of its proper divisors (235155052).

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

213244340 is a wasteful number, since it uses less digits than its factorization.

213244340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13967 (or 13965 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 213244340 is about 14602.8880705154. Note that the first 3 decimals coincide. The cubic root of 213244340 is about 597.4375348294.

Adding to 213244340 its reverse (43442312), we get a palindrome (256686652).

The spelling of 213244340 in words is "two hundred thirteen million, two hundred forty-four thousand, three hundred forty".