231643623 has 8 divisors (see below), whose sum is σ = 316041088. Its totient is φ = 150837624.

The previous prime is 231643613. The next prime is 231643627. The reversal of 231643623 is 326346132.

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

It is not a de Polignac number, because 231643623 - 2¹⁰ = 231642599 is a prime.

It is a super-2 number, since 2×231643623² = 107317536153132258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231643627) 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, 897715 + ... + 897972.

It is an arithmetic number, because the mean of its divisors is an integer number (39505136).

Almost surely, 2^231643623 is an apocalyptic number.

231643623 is a deficient number, since it is larger than the sum of its proper divisors (84397465).

231643623 is a wasteful number, since it uses less digits than its factorization.

231643623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795733.

The product of its digits is 15552, while the sum is 30.

The square root of 231643623 is about 15219.8430675221. The cubic root of 231643623 is about 614.1485765849.

Adding to 231643623 its reverse (326346132), we get a palindrome (557989755).

The spelling of 231643623 in words is "two hundred thirty-one million, six hundred forty-three thousand, six hundred twenty-three".