2145229125 has 32 divisors (see below), whose sum is σ = 3844259328. Its totient is φ = 1056110400.

The previous prime is 2145229123. The next prime is 2145229129. The reversal of 2145229125 is 5219225412.

It is not a de Polignac number, because 2145229125 - 2¹ = 2145229123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145229123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215149 + ... + 224898.

It is an arithmetic number, because the mean of its divisors is an integer number (120133104).

Almost surely, 2^2145229125 is an apocalyptic number.

2145229125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145229125 is a deficient number, since it is larger than the sum of its proper divisors (1699030203).

2145229125 is a wasteful number, since it uses less digits than its factorization.

2145229125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440078 (or 440068 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 2145229125 is about 46316.6182379500. The cubic root of 2145229125 is about 1289.7075083511.

The spelling of 2145229125 in words is "two billion, one hundred forty-five million, two hundred twenty-nine thousand, one hundred twenty-five".