213497 has 8 divisors (see below), whose sum is σ = 225792. Its totient is φ = 201600.

The previous prime is 213491. The next prime is 213523. The reversal of 213497 is 794312.

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 213497 - 2⁴ = 213481 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213497.

It is not an unprimeable number, because it can be changed into a prime (213491) 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, 2153 + ... + 2249.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2²¹³⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

213497 is a deficient number, since it is larger than the sum of its proper divisors (12295).

213497 is an equidigital number, since it uses as much as digits as its factorization.

213497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199.

The product of its digits is 1512, while the sum is 26.

The square root of 213497 is about 462.0573557471. The cubic root of 213497 is about 59.7673397268.

It can be divided in two parts, 21 and 3497, that multiplied together give a palindrome (73437).

The spelling of 213497 in words is "two hundred thirteen thousand, four hundred ninety-seven".