231642646 has 16 divisors (see below), whose sum is σ = 368465760. Its totient is φ = 108841600.

The previous prime is 231642643. The next prime is 231642659. The reversal of 231642646 is 646246132.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231642641) 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, 18975 + ... + 28693.

It is an arithmetic number, because the mean of its divisors is an integer number (23029110).

Almost surely, 2^231642646 is an apocalyptic number.

231642646 is a deficient number, since it is larger than the sum of its proper divisors (136823114).

231642646 is a wasteful number, since it uses less digits than its factorization.

231642646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439.

The product of its digits is 41472, while the sum is 34.

The square root of 231642646 is about 15219.8109712309. The cubic root of 231642646 is about 614.1477131551.

Adding to 231642646 its reverse (646246132), we get a palindrome (877888778).

The spelling of 231642646 in words is "two hundred thirty-one million, six hundred forty-two thousand, six hundred forty-six".