213497943 has 8 divisors (see below), whose sum is σ = 284735856. Its totient is φ = 142296000.

The previous prime is 213497909. The next prime is 213497953. The reversal of 213497943 is 349794312.

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

It is not a de Polignac number, because 213497943 - 2¹³ = 213489751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213497895 and 213497904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213497953) 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, 11593 + ... + 23693.

It is an arithmetic number, because the mean of its divisors is an integer number (35591982).

Almost surely, 2^213497943 is an apocalyptic number.

213497943 is a deficient number, since it is larger than the sum of its proper divisors (71237913).

213497943 is a wasteful number, since it uses less digits than its factorization.

213497943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17985.

The product of its digits is 163296, while the sum is 42.

The square root of 213497943 is about 14611.5688069420. The cubic root of 213497943 is about 597.6742772262.

It can be divided in two parts, 21349 and 7943, that added together give a palindrome (29292).

The spelling of 213497943 in words is "two hundred thirteen million, four hundred ninety-seven thousand, nine hundred forty-three".