213112340 has 96 divisors (see below), whose sum is σ = 546061824. Its totient is φ = 68198400.

The previous prime is 213112283. The next prime is 213112351. The reversal of 213112340 is 43211312.

213112340 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 (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359084 + ... + 359676.

It is an arithmetic number, because the mean of its divisors is an integer number (5688144).

Almost surely, 2^213112340 is an apocalyptic number.

213112340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213112340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273030912).

213112340 is an abundant number, since it is smaller than the sum of its proper divisors (332949484).

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

213112340 is a wasteful number, since it uses less digits than its factorization.

213112340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 213112340 is about 14598.3677169744. The cubic root of 213112340 is about 597.3142364694.

Adding to 213112340 its reverse (43211312), we get a palindrome (256323652).

The spelling of 213112340 in words is "two hundred thirteen million, one hundred twelve thousand, three hundred forty".