212154220450 has 24 divisors (see below), whose sum is σ = 405271903572. Its totient is φ = 82568128320.

The previous prime is 212154220441. The next prime is 212154220477. The reversal of 212154220450 is 54022451212.

It is a happy number.

212154220450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 165069126369 + 47085094081 = 406287^2 + 216991^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57337129 + ... + 57340828.

Almost surely, 2^212154220450 is an apocalyptic number.

212154220450 is a deficient number, since it is larger than the sum of its proper divisors (193117683122).

212154220450 is a wasteful number, since it uses less digits than its factorization.

212154220450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114678006 (or 114678001 counting only the distinct ones).

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

Adding to 212154220450 its reverse (54022451212), we get a palindrome (266176671662).

The spelling of 212154220450 in words is "two hundred twelve billion, one hundred fifty-four million, two hundred twenty thousand, four hundred fifty".