212115504 has 20 divisors (see below), whose sum is σ = 547965176. Its totient is φ = 70705152.

The previous prime is 212115503. The next prime is 212115523. The reversal of 212115504 is 405511212.

212115504 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (212115503) 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, 2209489 + ... + 2209584.

Almost surely, 2^212115504 is an apocalyptic number.

212115504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212115504 is an abundant number, since it is smaller than the sum of its proper divisors (335849672).

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

212115504 is a wasteful number, since it uses less digits than its factorization.

212115504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419084 (or 4419078 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 212115504 is about 14564.1856620959. The cubic root of 212115504 is about 596.3814653265.

Adding to 212115504 its reverse (405511212), we get a palindrome (617626716).

The spelling of 212115504 in words is "two hundred twelve million, one hundred fifteen thousand, five hundred four".