213449652 has 72 divisors (see below), whose sum is σ = 585148200. Its totient is φ = 65214720.

The previous prime is 213449609. The next prime is 213449693. The reversal of 213449652 is 256944312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14470416 + 198979236 = 3804^2 + 14106^2 .

It is a super-2 number, since 2×213449652² = 91121507877842208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68202 + ... + 71262.

Almost surely, 2^213449652 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 213449652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292574100).

213449652 is an abundant number, since it is smaller than the sum of its proper divisors (371698548).

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

213449652 is a wasteful number, since it uses less digits than its factorization.

213449652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233 (or 3228 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 213449652 is about 14609.9162215257. The cubic root of 213449652 is about 597.6292112730.

The spelling of 213449652 in words is "two hundred thirteen million, four hundred forty-nine thousand, six hundred fifty-two".