213958247 has 4 divisors (see below), whose sum is σ = 214021080. Its totient is φ = 213895416.

The previous prime is 213958231. The next prime is 213958253. The reversal of 213958247 is 742859312.

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 213958247 - 2⁴ = 213958231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213958207) 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, 25997 + ... + 33222.

It is an arithmetic number, because the mean of its divisors is an integer number (53505270).

Almost surely, 2^213958247 is an apocalyptic number.

213958247 is a deficient number, since it is larger than the sum of its proper divisors (62833).

213958247 is an equidigital number, since it uses as much as digits as its factorization.

213958247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62832.

The product of its digits is 120960, while the sum is 41.

The square root of 213958247 is about 14627.3116805516. The cubic root of 213958247 is about 598.1034997569.

The spelling of 213958247 in words is "two hundred thirteen million, nine hundred fifty-eight thousand, two hundred forty-seven".