212245450 has 12 divisors (see below), whose sum is σ = 394776630. Its totient is φ = 84898160.

The previous prime is 212245417. The next prime is 212245457. The reversal of 212245450 is 54542212.

It can be written as a sum of positive squares in 3 ways, for example, as 193849929 + 18395521 = 13923^2 + 4289^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (212245457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2122405 + ... + 2122504.

Almost surely, 2^212245450 is an apocalyptic number.

212245450 is a deficient number, since it is larger than the sum of its proper divisors (182531180).

212245450 is a wasteful number, since it uses less digits than its factorization.

212245450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244921 (or 4244916 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 212245450 is about 14568.6461279008. The cubic root of 212245450 is about 596.5032253493.

Adding to 212245450 its reverse (54542212), we get a palindrome (266787662).

The spelling of 212245450 in words is "two hundred twelve million, two hundred forty-five thousand, four hundred fifty".