212523340 has 12 divisors (see below), whose sum is σ = 446299056. Its totient is φ = 85009328.

The previous prime is 212523317. The next prime is 212523343. The reversal of 212523340 is 43325212.

212523340 is nontrivially palindromic in base 3.

212523340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (212523343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5313064 + ... + 5313103.

It is an arithmetic number, because the mean of its divisors is an integer number (37191588).

Almost surely, 2^212523340 is an apocalyptic number.

212523340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212523340 is an abundant number, since it is smaller than the sum of its proper divisors (233775716).

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

212523340 is a wasteful number, since it uses less digits than its factorization.

212523340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10626176 (or 10626174 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 212523340 is about 14578.1802705276. The cubic root of 212523340 is about 596.7634429267.

Adding to 212523340 its reverse (43325212), we get a palindrome (255848552).

The spelling of 212523340 in words is "two hundred twelve million, five hundred twenty-three thousand, three hundred forty".