213648319 has 2 divisors, whose sum is σ = 213648320. Its totient is φ = 213648318.

The previous prime is 213648317. The next prime is 213648341. The reversal of 213648319 is 913846312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213648319 - 2¹ = 213648317 is a prime.

It is a super-2 number, since 2×213648319² = 91291208423051522, which contains 22 as substring.

Together with 213648317, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213648317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106824159 + 106824160.

It is an arithmetic number, because the mean of its divisors is an integer number (106824160).

Almost surely, 2^213648319 is an apocalyptic number.

213648319 is a deficient number, since it is larger than the sum of its proper divisors (1).

213648319 is an equidigital number, since it uses as much as digits as its factorization.

213648319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 213648319 is about 14616.7136867355. The cubic root of 213648319 is about 597.8145670621.

The spelling of 213648319 in words is "two hundred thirteen million, six hundred forty-eight thousand, three hundred nineteen".