231610641 has 16 divisors (see below), whose sum is σ = 321884160. Its totient is φ = 147969360.

The previous prime is 231610633. The next prime is 231610679. The reversal of 231610641 is 146016132.

It is not a de Polignac number, because 231610641 - 2³ = 231610633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231610241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2511 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (20117760).

Almost surely, 2^231610641 is an apocalyptic number.

It is an amenable number.

231610641 is a deficient number, since it is larger than the sum of its proper divisors (90273519).

231610641 is a wasteful number, since it uses less digits than its factorization.

231610641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24316.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 231610641 is about 15218.7595092373. The cubic root of 231610641 is about 614.1194271965.

Adding to 231610641 its reverse (146016132), we get a palindrome (377626773).

The spelling of 231610641 in words is "two hundred thirty-one million, six hundred ten thousand, six hundred forty-one".