231037212 has 48 divisors (see below), whose sum is σ = 619334912. Its totient is φ = 65664000.

The previous prime is 231037199. The next prime is 231037241. The reversal of 231037212 is 212730132.

231037212 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9087 + ... + 23337.

Almost surely, 2^231037212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231037212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309667456).

231037212 is an abundant number, since it is smaller than the sum of its proper divisors (388297700).

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

231037212 is a wasteful number, since it uses less digits than its factorization.

231037212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14458 (or 14456 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 231037212 is about 15199.9082891970. The cubic root of 231037212 is about 613.6121895433.

Adding to 231037212 its reverse (212730132), we get a palindrome (443767344).

The spelling of 231037212 in words is "two hundred thirty-one million, thirty-seven thousand, two hundred twelve".