2145135125 has 64 divisors (see below), whose sum is σ = 3168681984. Its totient is φ = 1419206400.

The previous prime is 2145135119. The next prime is 2145135127. The reversal of 2145135125 is 5215315412.

It is not a de Polignac number, because 2145135125 - 2²⁴ = 2128357909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145135127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5600684 + ... + 5601066.

It is an arithmetic number, because the mean of its divisors is an integer number (49510656).

Almost surely, 2^2145135125 is an apocalyptic number.

2145135125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145135125 is a deficient number, since it is larger than the sum of its proper divisors (1023546859).

2145135125 is a wasteful number, since it uses less digits than its factorization.

2145135125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 605 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 2145135125 is about 46315.6034722641. The cubic root of 2145135125 is about 1289.6886705379.

The spelling of 2145135125 in words is "two billion, one hundred forty-five million, one hundred thirty-five thousand, one hundred twenty-five".