231620223 has 8 divisors (see below), whose sum is σ = 326993328. Its totient is φ = 145330304.

The previous prime is 231620219. The next prime is 231620227. The reversal of 231620223 is 322026132.

It is an interprime number because it is at equal distance from previous prime (231620219) and next prime (231620227).

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 231620223 - 2² = 231620219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231620223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231620227) 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, 2270736 + ... + 2270837.

It is an arithmetic number, because the mean of its divisors is an integer number (40874166).

Almost surely, 2^231620223 is an apocalyptic number.

231620223 is a deficient number, since it is larger than the sum of its proper divisors (95373105).

231620223 is a wasteful number, since it uses less digits than its factorization.

231620223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541593.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231620223 is about 15219.0743148195. The cubic root of 231620223 is about 614.1278960233.

Adding to 231620223 its reverse (322026132), we get a palindrome (553646355).

The spelling of 231620223 in words is "two hundred thirty-one million, six hundred twenty thousand, two hundred twenty-three".