2145423242525 has 12 divisors (see below), whose sum is σ = 2660354512500. Its totient is φ = 1716319438080.

The previous prime is 2145423242491. The next prime is 2145423242533. The reversal of 2145423242525 is 5252423245412.

It can be written as a sum of positive squares in 6 ways, for example, as 1077354733849 + 1068068508676 = 1037957^2 + 1033474^2 .

It is not a de Polignac number, because 2145423242525 - 2²⁰ = 2145422193949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2072351 + ... + 2930099.

It is an arithmetic number, because the mean of its divisors is an integer number (221696209375).

Almost surely, 2^{2145423242525} is an apocalyptic number.

2145423242525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145423242525 is a deficient number, since it is larger than the sum of its proper divisors (514931269975).

2145423242525 is a wasteful number, since it uses less digits than its factorization.

2145423242525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957808 (or 957803 counting only the distinct ones).

The product of its digits is 768000, while the sum is 41.

Adding to 2145423242525 its reverse (5252423245412), we get a palindrome (7397846487937).

The spelling of 2145423242525 in words is "two trillion, one hundred forty-five billion, four hundred twenty-three million, two hundred forty-two thousand, five hundred twenty-five".