2145443125 has 40 divisors (see below), whose sum is σ = 3077015040. Its totient is φ = 1464888000.

The previous prime is 2145443119. The next prime is 2145443143. The reversal of 2145443125 is 5213445412.

It is not a de Polignac number, because 2145443125 - 2³ = 2145443117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1175964 + ... + 1177786.

It is an arithmetic number, because the mean of its divisors is an integer number (76925376).

Almost surely, 2^2145443125 is an apocalyptic number.

2145443125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145443125 is a deficient number, since it is larger than the sum of its proper divisors (931571915).

2145443125 is an equidigital number, since it uses as much as digits as its factorization.

2145443125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119 (or 2104 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 2145443125 is about 46318.9283662738. The cubic root of 2145443125 is about 1289.7503923841.

Adding to 2145443125 its reverse (5213445412), we get a palindrome (7358888537).

The spelling of 2145443125 in words is "two billion, one hundred forty-five million, four hundred forty-three thousand, one hundred twenty-five".