213251532 has 24 divisors (see below), whose sum is σ = 535863216. Its totient is φ = 65615808.

The previous prime is 213251531. The next prime is 213251539. The reversal of 213251532 is 235152312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213251531) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 683343 + ... + 683654.

It is an arithmetic number, because the mean of its divisors is an integer number (22327634).

Almost surely, 2^213251532 is an apocalyptic number.

It is an amenable number.

213251532 is an abundant number, since it is smaller than the sum of its proper divisors (322611684).

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

213251532 is a wasteful number, since it uses less digits than its factorization.

213251532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367017 (or 1367015 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 213251532 is about 14603.1343210970. The cubic root of 213251532 is about 597.4442512600. Note that the first 3 decimals are identical.

The spelling of 213251532 in words is "two hundred thirteen million, two hundred fifty-one thousand, five hundred thirty-two".