231336641 has 4 divisors (see below), whose sum is σ = 232216512. Its totient is φ = 230456772.

The previous prime is 231336619. The next prime is 231336659. The reversal of 231336641 is 146633132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231336641 - 2⁶ = 231336577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231336541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439541 + ... + 440066.

It is an arithmetic number, because the mean of its divisors is an integer number (58054128).

Almost surely, 2^231336641 is an apocalyptic number.

It is an amenable number.

231336641 is a deficient number, since it is larger than the sum of its proper divisors (879871).

231336641 is an equidigital number, since it uses as much as digits as its factorization.

231336641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879870.

The product of its digits is 7776, while the sum is 29.

The square root of 231336641 is about 15209.7547974976. The cubic root of 231336641 is about 613.8771597989.

Adding to 231336641 its reverse (146633132), we get a palindrome (377969773).

The spelling of 231336641 in words is "two hundred thirty-one million, three hundred thirty-six thousand, six hundred forty-one".