213257443 has 8 divisors (see below), whose sum is σ = 243955712. Its totient is φ = 182617416.

The previous prime is 213257431. The next prime is 213257467. The reversal of 213257443 is 344752312.

It is a happy number.

213257443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213257443 - 2¹⁷ = 213126371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213257543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6405 + ... + 21622.

It is an arithmetic number, because the mean of its divisors is an integer number (30494464).

Almost surely, 2^213257443 is an apocalyptic number.

213257443 is a deficient number, since it is larger than the sum of its proper divisors (30698269).

213257443 is a wasteful number, since it uses less digits than its factorization.

213257443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29121.

The product of its digits is 20160, while the sum is 31.

The square root of 213257443 is about 14603.3367077528. The cubic root of 213257443 is about 597.4497712834.

The spelling of 213257443 in words is "two hundred thirteen million, two hundred fifty-seven thousand, four hundred forty-three".