213346531 has 8 divisors (see below), whose sum is σ = 217088000. Its totient is φ = 209631240.

The previous prime is 213346517. The next prime is 213346543. The reversal of 213346531 is 135643312.

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

It is not a de Polignac number, because 213346531 - 2⁵ = 213346499 is a prime.

It is a super-2 number, since 2×213346531² = 91033484579467922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213346531.

It is not an unprimeable number, because it can be changed into a prime (213346501) 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, 10270 + ... + 23068.

It is an arithmetic number, because the mean of its divisors is an integer number (27136000).

Almost surely, 2^213346531 is an apocalyptic number.

213346531 is a deficient number, since it is larger than the sum of its proper divisors (3741469).

213346531 is a wasteful number, since it uses less digits than its factorization.

213346531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13089.

The product of its digits is 6480, while the sum is 28.

The square root of 213346531 is about 14606.3866510510. The cubic root of 213346531 is about 597.5329543048.

Adding to 213346531 its reverse (135643312), we get a palindrome (348989843).

The spelling of 213346531 in words is "two hundred thirteen million, three hundred forty-six thousand, five hundred thirty-one".