213281343 has 28 divisors (see below), whose sum is σ = 348859368. Its totient is φ = 129256560.

The previous prime is 213281339. The next prime is 213281363. The reversal of 213281343 is 343182312.

It is not a de Polignac number, because 213281343 - 2² = 213281339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213281363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5280 + ... + 21317.

Almost surely, 2^213281343 is an apocalyptic number.

213281343 is a deficient number, since it is larger than the sum of its proper divisors (135578025).

213281343 is an equidigital number, since it uses as much as digits as its factorization.

213281343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26626 (or 26611 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 213281343 is about 14604.1549909606. The cubic root of 213281343 is about 597.4720894043.

The spelling of 213281343 in words is "two hundred thirteen million, two hundred eighty-one thousand, three hundred forty-three".