212220536 has 16 divisors (see below), whose sum is σ = 434087640. Its totient is φ = 96463840.

The previous prime is 212220527. The next prime is 212220559. The reversal of 212220536 is 635022212.

212220536 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205711 + ... + 1205886.

Almost surely, 2^212220536 is an apocalyptic number.

It is an amenable number.

212220536 is an abundant number, since it is smaller than the sum of its proper divisors (221867104).

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

212220536 is a wasteful number, since it uses less digits than its factorization.

212220536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411614 (or 2411610 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 212220536 is about 14567.7910473757. The cubic root of 212220536 is about 596.4798846638.

Adding to 212220536 its reverse (635022212), we get a palindrome (847242748).

The spelling of 212220536 in words is "two hundred twelve million, two hundred twenty thousand, five hundred thirty-six".