213686452 has 36 divisors (see below), whose sum is σ = 437150784. Its totient is φ = 91128240.

The previous prime is 213686449. The next prime is 213686453. The reversal of 213686452 is 254686312.

213686452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213686453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38773 + ... + 43939.

Almost surely, 2^213686452 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 213686452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218575392).

213686452 is an abundant number, since it is smaller than the sum of its proper divisors (223464332).

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

213686452 is a wasteful number, since it uses less digits than its factorization.

213686452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396 (or 5387 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 213686452 is about 14618.0180599150. The cubic root of 213686452 is about 597.8501319051.

It can be divided in two parts, 2136 and 86452, that added together give a palindrome (88588).

The spelling of 213686452 in words is "two hundred thirteen million, six hundred eighty-six thousand, four hundred fifty-two".