231406212 has 12 divisors (see below), whose sum is σ = 539947856. Its totient is φ = 77135400.

The previous prime is 231406211. The next prime is 231406213. The reversal of 231406212 is 212604132.

It is an interprime number because it is at equal distance from previous prime (231406211) and next prime (231406213).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (231406211) 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, 9641914 + ... + 9641937.

Almost surely, 2^231406212 is an apocalyptic number.

It is an amenable number.

231406212 is an abundant number, since it is smaller than the sum of its proper divisors (308541644).

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

231406212 is a wasteful number, since it uses less digits than its factorization.

231406212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19283858 (or 19283856 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 231406212 is about 15212.0416775658. The cubic root of 231406212 is about 613.9386917250.

The spelling of 231406212 in words is "two hundred thirty-one million, four hundred six thousand, two hundred twelve".