2152807123 has 4 divisors (see below), whose sum is σ = 2152990720. Its totient is φ = 2152623528.

The previous prime is 2152807109. The next prime is 2152807133. The reversal of 2152807123 is 3217082512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152807123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152807133) 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 3 ways as a sum of consecutive naturals, for example, 72915 + ... + 98092.

It is an arithmetic number, because the mean of its divisors is an integer number (538247680).

Almost surely, 2^2152807123 is an apocalyptic number.

2152807123 is a deficient number, since it is larger than the sum of its proper divisors (183597).

2152807123 is a wasteful number, since it uses less digits than its factorization.

2152807123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183596.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2152807123 is about 46398.3525892892. The cubic root of 2152807123 is about 1291.2243494806.

Adding to 2152807123 its reverse (3217082512), we get a palindrome (5369889635).

The spelling of 2152807123 in words is "two billion, one hundred fifty-two million, eight hundred seven thousand, one hundred twenty-three".