213352831 has 4 divisors (see below), whose sum is σ = 213910272. Its totient is φ = 212795392.

The previous prime is 213352829. The next prime is 213352837. The reversal of 213352831 is 138253312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213352831 - 2¹ = 213352829 is a prime.

It is a super-2 number, since 2×213352831² = 91038860991429122, 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 213352831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213352837) 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 3 ways as a sum of consecutive naturals, for example, 278146 + ... + 278911.

It is an arithmetic number, because the mean of its divisors is an integer number (53477568).

Almost surely, 2^213352831 is an apocalyptic number.

213352831 is a deficient number, since it is larger than the sum of its proper divisors (557441).

213352831 is an equidigital number, since it uses as much as digits as its factorization.

213352831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557440.

The product of its digits is 4320, while the sum is 28.

The square root of 213352831 is about 14606.6023085453. The cubic root of 213352831 is about 597.5388358481.

The spelling of 213352831 in words is "two hundred thirteen million, three hundred fifty-two thousand, eight hundred thirty-one".