212331042 has 144 divisors (see below), whose sum is σ = 609161280. Its totient is φ = 52176960.

The previous prime is 212330999. The next prime is 212331089. The reversal of 212331042 is 240133212.

212331042 is digitally balanced in base 2, because in such base 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 (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 289308 + ... + 290040.

Almost surely, 2^212331042 is an apocalyptic number.

212331042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212331042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304580640).

212331042 is an abundant number, since it is smaller than the sum of its proper divisors (396830238).

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

212331042 is a wasteful number, since it uses less digits than its factorization.

212331042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 212331042 is about 14571.5833731273. The cubic root of 212331042 is about 596.5833983165.

Adding to 212331042 its reverse (240133212), we get a palindrome (452464254).

The spelling of 212331042 in words is "two hundred twelve million, three hundred thirty-one thousand, forty-two".