2123355015 has 24 divisors (see below), whose sum is σ = 3730905360. Its totient is φ = 1116941184.

The previous prime is 2123354977. The next prime is 2123355019. The reversal of 2123355015 is 5105533212.

It is a happy number.

2123355015 is a `hidden beast` number, since 2 + 123 + 35 + 501 + 5 = 666.

It is not a de Polignac number, because 2123355015 - 2¹⁴ = 2123338631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2123355015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123355019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319905 + ... + 326474.

It is an arithmetic number, because the mean of its divisors is an integer number (155454390).

Almost surely, 2^2123355015 is an apocalyptic number.

2123355015 is a deficient number, since it is larger than the sum of its proper divisors (1607550345).

2123355015 is a wasteful number, since it uses less digits than its factorization.

2123355015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646463 (or 646460 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 2123355015 is about 46079.8764646782. The cubic root of 2123355015 is about 1285.3089669730.

Adding to 2123355015 its reverse (5105533212), we get a palindrome (7228888227).

The spelling of 2123355015 in words is "two billion, one hundred twenty-three million, three hundred fifty-five thousand, fifteen".