2145251125 has 8 divisors (see below), whose sum is σ = 2677273560. Its totient is φ = 1716200800.

The previous prime is 2145251081. The next prime is 2145251237. The reversal of 2145251125 is 5211525412.

It can be written as a sum of positive squares in 4 ways, for example, as 99860049 + 2045391076 = 9993^2 + 45226^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2145251125 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145251093 and 2145251102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8580880 + ... + 8581129.

It is an arithmetic number, because the mean of its divisors is an integer number (334659195).

Almost surely, 2^2145251125 is an apocalyptic number.

2145251125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145251125 is a deficient number, since it is larger than the sum of its proper divisors (532022435).

2145251125 is an equidigital number, since it uses as much as digits as its factorization.

2145251125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17162024 (or 17162014 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The square root of 2145251125 is about 46316.8557330914. The cubic root of 2145251125 is about 1289.7119171215.

Adding to 2145251125 its reverse (5211525412), we get a palindrome (7356776537).

The spelling of 2145251125 in words is "two billion, one hundred forty-five million, two hundred fifty-one thousand, one hundred twenty-five".