2123040155 has 8 divisors (see below), whose sum is σ = 2697509952. Its totient is φ = 1598524288.

The previous prime is 2123040137. The next prime is 2123040169. The reversal of 2123040155 is 5510403212.

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

It is a cyclic number.

It is not a de Polignac number, because 2123040155 - 2¹⁶ = 2122974619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2123040155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12488387 + ... + 12488556.

It is an arithmetic number, because the mean of its divisors is an integer number (337188744).

Almost surely, 2^2123040155 is an apocalyptic number.

2123040155 is a deficient number, since it is larger than the sum of its proper divisors (574469797).

2123040155 is a wasteful number, since it uses less digits than its factorization.

2123040155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24976965.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2123040155 is about 46076.4598792051. The cubic root of 2123040155 is about 1285.2454334952.

Adding to 2123040155 its reverse (5510403212), we get a palindrome (7633443367).

The spelling of 2123040155 in words is "two billion, one hundred twenty-three million, forty thousand, one hundred fifty-five".