2123115445 has 32 divisors (see below), whose sum is σ = 2897648640. Its totient is φ = 1479360000.

The previous prime is 2123115439. The next prime is 2123115469. The reversal of 2123115445 is 5445113212.

It is not a de Polignac number, because 2123115445 - 2³ = 2123115437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166041 + ... + 178369.

It is an arithmetic number, because the mean of its divisors is an integer number (90551520).

Almost surely, 2^2123115445 is an apocalyptic number.

It is an amenable number.

2123115445 is a deficient number, since it is larger than the sum of its proper divisors (774533195).

2123115445 is a wasteful number, since it uses less digits than its factorization.

2123115445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12477.

The product of its digits is 4800, while the sum is 28.

The square root of 2123115445 is about 46077.2768835139. The cubic root of 2123115445 is about 1285.2606263284.

Adding to 2123115445 its reverse (5445113212), we get a palindrome (7568228657).

The spelling of 2123115445 in words is "two billion, one hundred twenty-three million, one hundred fifteen thousand, four hundred forty-five".