212544451 has 16 divisors (see below), whose sum is σ = 257423040. Its totient is φ = 171601920.

The previous prime is 212544443. The next prime is 212544461. The reversal of 212544451 is 154445212.

It is not a de Polignac number, because 212544451 - 2³ = 212544443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212544461) 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, 4446 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (16088940).

Almost surely, 2^212544451 is an apocalyptic number.

212544451 is a deficient number, since it is larger than the sum of its proper divisors (44878589).

212544451 is a wasteful number, since it uses less digits than its factorization.

212544451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25614.

The product of its digits is 6400, while the sum is 28.

The square root of 212544451 is about 14578.9043141109. The cubic root of 212544451 is about 596.7832020991.

Adding to 212544451 its reverse (154445212), we get a palindrome (366989663).

The spelling of 212544451 in words is "two hundred twelve million, five hundred forty-four thousand, four hundred fifty-one".