213248643 has 4 divisors (see below), whose sum is σ = 284331528. Its totient is φ = 142165760.

The previous prime is 213248639. The next prime is 213248669. The reversal of 213248643 is 346842312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213248643 - 2² = 213248639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213241643) 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, 35541438 + ... + 35541443.

It is an arithmetic number, because the mean of its divisors is an integer number (71082882).

Almost surely, 2^213248643 is an apocalyptic number.

213248643 is a deficient number, since it is larger than the sum of its proper divisors (71082885).

213248643 is an equidigital number, since it uses as much as digits as its factorization.

213248643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71082884.

The product of its digits is 27648, while the sum is 33.

The square root of 213248643 is about 14603.0354036413. The cubic root of 213248643 is about 597.4415533127.

The spelling of 213248643 in words is "two hundred thirteen million, two hundred forty-eight thousand, six hundred forty-three".