231971466 has 8 divisors (see below), whose sum is σ = 463942944. Its totient is φ = 77323820.

The previous prime is 231971459. The next prime is 231971473. The reversal of 231971466 is 664179132.

It is an interprime number because it is at equal distance from previous prime (231971459) and next prime (231971473).

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

231971466 is an admirable number.

It is a super-2 number, since 2×231971466² = 107621522076378312, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19330950 + ... + 19330961.

It is an arithmetic number, because the mean of its divisors is an integer number (57992868).

Almost surely, 2^231971466 is an apocalyptic number.

231971466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231971466 is a wasteful number, since it uses less digits than its factorization.

231971466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38661916.

The product of its digits is 54432, while the sum is 39.

The square root of 231971466 is about 15230.6095084865. The cubic root of 231971466 is about 614.4381728721.

The spelling of 231971466 in words is "two hundred thirty-one million, nine hundred seventy-one thousand, four hundred sixty-six".