212320454 has 8 divisors (see below), whose sum is σ = 323234328. Its totient is φ = 104575680.

The previous prime is 212320453. The next prime is 212320469. The reversal of 212320454 is 454023212.

It is a happy number.

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

It is a super-2 number, since 2×212320454² = 90159950373532232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212320453) 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 3 ways as a sum of consecutive naturals, for example, 792107 + ... + 792374.

It is an arithmetic number, because the mean of its divisors is an integer number (40404291).

Almost surely, 2^212320454 is an apocalyptic number.

212320454 is a deficient number, since it is larger than the sum of its proper divisors (110913874).

212320454 is a wasteful number, since it uses less digits than its factorization.

212320454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584550.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 212320454 is about 14571.2200587322. The cubic root of 212320454 is about 596.5734818359.

Adding to 212320454 its reverse (454023212), we get a palindrome (666343666).

The spelling of 212320454 in words is "two hundred twelve million, three hundred twenty thousand, four hundred fifty-four".