231166261 has 8 divisors (see below), whose sum is σ = 241372800. Its totient is φ = 220972752.

The previous prime is 231166259. The next prime is 231166283. The reversal of 231166261 is 162661132.

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

It is a cyclic number.

It is not a de Polignac number, because 231166261 - 2¹ = 231166259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231166211) 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, 56656 + ... + 60598.

It is an arithmetic number, because the mean of its divisors is an integer number (30171600).

Almost surely, 2^231166261 is an apocalyptic number.

It is an amenable number.

231166261 is a deficient number, since it is larger than the sum of its proper divisors (10206539).

231166261 is a wasteful number, since it uses less digits than its factorization.

231166261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6515.

The product of its digits is 2592, while the sum is 28.

The square root of 231166261 is about 15204.1527550864. The cubic root of 231166261 is about 613.7264154434.

The spelling of 231166261 in words is "two hundred thirty-one million, one hundred sixty-six thousand, two hundred sixty-one".