2123243445 has 32 divisors (see below), whose sum is σ = 3607689600. Its totient is φ = 1063286784.

The previous prime is 2123243431. The next prime is 2123243449. The reversal of 2123243445 is 5443423212.

It is not a de Polignac number, because 2123243445 - 2²⁸ = 1854807989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123243449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 760 + ... + 65169.

It is an arithmetic number, because the mean of its divisors is an integer number (112740300).

Almost surely, 2^2123243445 is an apocalyptic number.

It is an amenable number.

2123243445 is a deficient number, since it is larger than the sum of its proper divisors (1484446155).

2123243445 is a wasteful number, since it uses less digits than its factorization.

2123243445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66069.

The product of its digits is 23040, while the sum is 30.

The square root of 2123243445 is about 46078.6658335503. The cubic root of 2123243445 is about 1285.2864547330.

Adding to 2123243445 its reverse (5443423212), we get a palindrome (7566666657).

The spelling of 2123243445 in words is "two billion, one hundred twenty-three million, two hundred forty-three thousand, four hundred forty-five".