212204745 has 64 divisors (see below), whose sum is σ = 396576000. Its totient is φ = 107509248.

The previous prime is 212204743. The next prime is 212204779. The reversal of 212204745 is 547402212.

It is not a de Polignac number, because 212204745 - 2¹ = 212204743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (212204743) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 261901 + ... + 262709.

It is an arithmetic number, because the mean of its divisors is an integer number (6196500).

Almost surely, 2^212204745 is an apocalyptic number.

It is an amenable number.

212204745 is a deficient number, since it is larger than the sum of its proper divisors (184371255).

212204745 is a wasteful number, since it uses less digits than its factorization.

212204745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 212204745 is about 14567.2490539566. The cubic root of 212204745 is about 596.4650899167.

Adding to 212204745 its reverse (547402212), we get a palindrome (759606957).

The spelling of 212204745 in words is "two hundred twelve million, two hundred four thousand, seven hundred forty-five".