213531115 has 8 divisors (see below), whose sum is σ = 292842720. Its totient is φ = 146421312.

The previous prime is 213531091. The next prime is 213531119. The reversal of 213531115 is 511135312.

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 213531115 - 2¹³ = 213522923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213531119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3050410 + ... + 3050479.

It is an arithmetic number, because the mean of its divisors is an integer number (36605340).

Almost surely, 2^213531115 is an apocalyptic number.

213531115 is a deficient number, since it is larger than the sum of its proper divisors (79311605).

213531115 is an equidigital number, since it uses as much as digits as its factorization.

213531115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100901.

The product of its digits is 450, while the sum is 22.

The square root of 213531115 is about 14612.7038907931. The cubic root of 213531115 is about 597.7052299434.

Adding to 213531115 its reverse (511135312), we get a palindrome (724666427).

The spelling of 213531115 in words is "two hundred thirteen million, five hundred thirty-one thousand, one hundred fifteen".