212045450 has 12 divisors (see below), whose sum is σ = 394404630. Its totient is φ = 84818160.

The previous prime is 212045447. The next prime is 212045479. The reversal of 212045450 is 54540212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 151314601 + 60730849 = 12301^2 + 7793^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2120405 + ... + 2120504.

Almost surely, 2^212045450 is an apocalyptic number.

212045450 is a deficient number, since it is larger than the sum of its proper divisors (182359180).

212045450 is a wasteful number, since it uses less digits than its factorization.

212045450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240921 (or 4240916 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 212045450 is about 14561.7804543263. The cubic root of 212045450 is about 596.3158037623.

Adding to 212045450 its reverse (54540212), we get a palindrome (266585662).

The spelling of 212045450 in words is "two hundred twelve million, forty-five thousand, four hundred fifty".