213653243 has 8 divisors (see below), whose sum is σ = 215815680. Its totient is φ = 211498560.

The previous prime is 213653239. The next prime is 213653257. The reversal of 213653243 is 342356312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213653243 - 2² = 213653239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213653543) 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 7 ways as a sum of consecutive naturals, for example, 64553 + ... + 67781.

It is an arithmetic number, because the mean of its divisors is an integer number (26976960).

Almost surely, 2^213653243 is an apocalyptic number.

213653243 is a deficient number, since it is larger than the sum of its proper divisors (2162437).

213653243 is a wasteful number, since it uses less digits than its factorization.

213653243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877.

The product of its digits is 12960, while the sum is 29.

The square root of 213653243 is about 14616.8821230795. The cubic root of 213653243 is about 597.8191596816.

The spelling of 213653243 in words is "two hundred thirteen million, six hundred fifty-three thousand, two hundred forty-three".