212240455 has 8 divisors (see below), whose sum is σ = 291072672. Its totient is φ = 145536288.

The previous prime is 212240449. The next prime is 212240471. The reversal of 212240455 is 554042212.

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

It is a cyclic number.

It is not a de Polignac number, because 212240455 - 2¹⁵ = 212207687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3031972 + ... + 3032041.

It is an arithmetic number, because the mean of its divisors is an integer number (36384084).

Almost surely, 2^212240455 is an apocalyptic number.

212240455 is a deficient number, since it is larger than the sum of its proper divisors (78832217).

212240455 is an equidigital number, since it uses as much as digits as its factorization.

212240455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064025.

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

The square root of 212240455 is about 14568.4746970985. The cubic root of 212240455 is about 596.4985459290.

Adding to 212240455 its reverse (554042212), we get a palindrome (766282667).

The spelling of 212240455 in words is "two hundred twelve million, two hundred forty thousand, four hundred fifty-five".