231620345 has 8 divisors (see below), whose sum is σ = 303212160. Its totient is φ = 168451120.

The previous prime is 231620341. The next prime is 231620387. The reversal of 231620345 is 543026132.

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

It is not a de Polignac number, because 231620345 - 2² = 231620341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231620341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105585 + ... + 2105694.

It is an arithmetic number, because the mean of its divisors is an integer number (37901520).

Almost surely, 2^231620345 is an apocalyptic number.

It is an amenable number.

231620345 is a deficient number, since it is larger than the sum of its proper divisors (71591815).

231620345 is a wasteful number, since it uses less digits than its factorization.

231620345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211295.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 231620345 is about 15219.0783229472. The cubic root of 231620345 is about 614.1280038486.

Adding to 231620345 its reverse (543026132), we get a palindrome (774646477).

The spelling of 231620345 in words is "two hundred thirty-one million, six hundred twenty thousand, three hundred forty-five".