231400212 has 24 divisors (see below), whose sum is σ = 545178816. Its totient is φ = 76384128.

The previous prime is 231400207. The next prime is 231400219. The reversal of 231400212 is 212004132.

231400212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231400212² = 107092116227289888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231400191 and 231400200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231400219) 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, 92373 + ... + 94844.

It is an arithmetic number, because the mean of its divisors is an integer number (22715784).

Almost surely, 2^231400212 is an apocalyptic number.

It is an amenable number.

231400212 is an abundant number, since it is smaller than the sum of its proper divisors (313778604).

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

231400212 is a wasteful number, since it uses less digits than its factorization.

231400212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187327 (or 187325 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 231400212 is about 15211.8444641010. The cubic root of 231400212 is about 613.9333855235.

Adding to 231400212 its reverse (212004132), we get a palindrome (443404344).

The spelling of 231400212 in words is "two hundred thirty-one million, four hundred thousand, two hundred twelve".