231365661 has 8 divisors (see below), whose sum is σ = 311668224. Its totient is φ = 152653440.

The previous prime is 231365653. The next prime is 231365663. The reversal of 231365661 is 166563132.

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

It is not a de Polignac number, because 231365661 - 2³ = 231365653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231365663) 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, 397245 + ... + 397826.

It is an arithmetic number, because the mean of its divisors is an integer number (38958528).

Almost surely, 2^231365661 is an apocalyptic number.

It is an amenable number.

231365661 is a deficient number, since it is larger than the sum of its proper divisors (80302563).

231365661 is an equidigital number, since it uses as much as digits as its factorization.

231365661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795171.

The product of its digits is 19440, while the sum is 33.

The square root of 231365661 is about 15210.7087606068. The cubic root of 231365661 is about 613.9028279770.

The spelling of 231365661 in words is "two hundred thirty-one million, three hundred sixty-five thousand, six hundred sixty-one".