231907212 has 120 divisors (see below), whose sum is σ = 629517504. Its totient is φ = 74400768.

The previous prime is 231907189. The next prime is 231907219. The reversal of 231907212 is 212709132.

It is a super-2 number, since 2×231907212² = 107561909955225888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (231907219) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1477038 + ... + 1477194.

Almost surely, 2^231907212 is an apocalyptic number.

It is a pronic number, being equal to 15228×15229.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231907212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314758752).

231907212 is an abundant number, since it is smaller than the sum of its proper divisors (397610292).

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

231907212 is a wasteful number, since it uses less digits than its factorization.

231907212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 231907212 is about 15228.4999917917. The cubic root of 231907212 is about 614.3814363593.

The spelling of 231907212 in words is "two hundred thirty-one million, nine hundred seven thousand, two hundred twelve".