231690441 has 4 divisors (see below), whose sum is σ = 308920592. Its totient is φ = 154460292.

The previous prime is 231690419. The next prime is 231690443. The reversal of 231690441 is 144096132.

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 not a de Polignac number, because 231690441 - 2⁵ = 231690409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231690399 and 231690408.

It is not an unprimeable number, because it can be changed into a prime (231690443) 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, 38615071 + ... + 38615076.

It is an arithmetic number, because the mean of its divisors is an integer number (77230148).

Almost surely, 2^231690441 is an apocalyptic number.

It is an amenable number.

231690441 is a deficient number, since it is larger than the sum of its proper divisors (77230151).

231690441 is an equidigital number, since it uses as much as digits as its factorization.

231690441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77230150.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 231690441 is about 15221.3810477236. The cubic root of 231690441 is about 614.1899494357.

The spelling of 231690441 in words is "two hundred thirty-one million, six hundred ninety thousand, four hundred forty-one".