213505252 has 6 divisors (see below), whose sum is σ = 373634198. Its totient is φ = 106752624.

The previous prime is 213505231. The next prime is 213505289. The reversal of 213505252 is 252505312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 193933476 + 19571776 = 13926^2 + 4424^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26688153 + ... + 26688160.

Almost surely, 2^213505252 is an apocalyptic number.

It is an amenable number.

213505252 is a deficient number, since it is larger than the sum of its proper divisors (160128946).

213505252 is a wasteful number, since it uses less digits than its factorization.

213505252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53376317 (or 53376315 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 213505252 is about 14611.8189148374. The cubic root of 213505252 is about 597.6810975127.

The spelling of 213505252 in words is "two hundred thirteen million, five hundred five thousand, two hundred fifty-two".