213220232331 has 8 divisors (see below), whose sum is σ = 284355992784. Its totient is φ = 142115646720.

The previous prime is 213220232293. The next prime is 213220232347. The reversal of 213220232331 is 133232022312.

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

It is not a de Polignac number, because 213220232331 - 2³¹ = 211072748683 is a prime.

It is a super-2 number, since 2×213220232331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213220232231) 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, 7777746 + ... + 7805111.

It is an arithmetic number, because the mean of its divisors is an integer number (35544499098).

Almost surely, 2^213220232331 is an apocalyptic number.

213220232331 is a deficient number, since it is larger than the sum of its proper divisors (71135760453).

213220232331 is a wasteful number, since it uses less digits than its factorization.

213220232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15587421.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 213220232331 its reverse (133232022312), we get a palindrome (346452254643).

The spelling of 213220232331 in words is "two hundred thirteen billion, two hundred twenty million, two hundred thirty-two thousand, three hundred thirty-one".