2123405352 has 24 divisors (see below), whose sum is σ = 5750889690. Its totient is φ = 707801760.

The previous prime is 2123405341. The next prime is 2123405353. The reversal of 2123405352 is 2535043212.

It is a happy number.

2123405352 is a `hidden beast` number, since 2 + 123 + 4 + 0 + 535 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1429293636 + 694111716 = 37806^2 + 26346^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (2123405353) 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 5 ways as a sum of consecutive naturals, for example, 14745799 + ... + 14745942.

Almost surely, 2^2123405352 is an apocalyptic number.

It is an amenable number.

2123405352 is an abundant number, since it is smaller than the sum of its proper divisors (3627484338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123405352 is a wasteful number, since it uses less digits than its factorization.

2123405352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29491753 (or 29491746 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 2123405352 is about 46080.4226543117. The cubic root of 2123405352 is about 1285.3191235547.

Adding to 2123405352 its reverse (2535043212), we get a palindrome (4658448564).

The spelling of 2123405352 in words is "two billion, one hundred twenty-three million, four hundred five thousand, three hundred fifty-two".