212213451 has 16 divisors (see below), whose sum is σ = 298166400. Its totient is φ = 133884288.

The previous prime is 212213429. The next prime is 212213453. The reversal of 212213451 is 154312212.

It is not a de Polignac number, because 212213451 - 2¹⁸ = 211951307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212213453) 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, 80035 + ... + 82643.

It is an arithmetic number, because the mean of its divisors is an integer number (18635400).

Almost surely, 2^212213451 is an apocalyptic number.

212213451 is a deficient number, since it is larger than the sum of its proper divisors (85952949).

212213451 is a wasteful number, since it uses less digits than its factorization.

212213451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058.

The product of its digits is 480, while the sum is 21.

The square root of 212213451 is about 14567.5478718966. The cubic root of 212213451 is about 596.4732467467.

Adding to 212213451 its reverse (154312212), we get a palindrome (366525663).

The spelling of 212213451 in words is "two hundred twelve million, two hundred thirteen thousand, four hundred fifty-one".