212221532 has 12 divisors (see below), whose sum is σ = 371736960. Its totient is φ = 106010976.

The previous prime is 212221531. The next prime is 212221543. The reversal of 212221532 is 235122212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221531) 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, 20057 + ... + 28752.

It is an arithmetic number, because the mean of its divisors is an integer number (30978080).

Almost surely, 2^212221532 is an apocalyptic number.

It is an amenable number.

212221532 is a deficient number, since it is larger than the sum of its proper divisors (159515428).

212221532 is a wasteful number, since it uses less digits than its factorization.

212221532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49900 (or 49898 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 212221532 is about 14567.8252323399. The cubic root of 212221532 is about 596.4808178017.

Adding to 212221532 its reverse (235122212), we get a palindrome (447343744).

The spelling of 212221532 in words is "two hundred twelve million, two hundred twenty-one thousand, five hundred thirty-two".