212049780 has 48 divisors (see below), whose sum is σ = 596393280. Its totient is φ = 56293888.

The previous prime is 212049763. The next prime is 212049781. The reversal of 212049780 is 87940212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212049781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5836 + ... + 21404.

It is an arithmetic number, because the mean of its divisors is an integer number (12424860).

Almost surely, 2^212049780 is an apocalyptic number.

212049780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212049780 is an abundant number, since it is smaller than the sum of its proper divisors (384343500).

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

212049780 is a wasteful number, since it uses less digits than its factorization.

212049780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15808 (or 15806 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 212049780 is about 14561.9291304415. The cubic root of 212049780 is about 596.3198626875.

Adding to 212049780 its reverse (87940212), we get a palindrome (299989992).

The spelling of 212049780 in words is "two hundred twelve million, forty-nine thousand, seven hundred eighty".