212404445 has 8 divisors (see below), whose sum is σ = 278056800. Its totient is φ = 154475920.

The previous prime is 212404429. The next prime is 212404447. The reversal of 212404445 is 544404212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212404445 - 2⁴ = 212404429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212404447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1930895 + ... + 1931004.

It is an arithmetic number, because the mean of its divisors is an integer number (34757100).

Almost surely, 2^212404445 is an apocalyptic number.

It is an amenable number.

212404445 is a deficient number, since it is larger than the sum of its proper divisors (65652355).

212404445 is a wasteful number, since it uses less digits than its factorization.

212404445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861915.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 212404445 is about 14574.1018591198. The cubic root of 212404445 is about 596.6521368385.

Adding to 212404445 its reverse (544404212), we get a palindrome (756808657).

The spelling of 212404445 in words is "two hundred twelve million, four hundred four thousand, four hundred forty-five".