2145240525 has 24 divisors (see below), whose sum is σ = 3560959584. Its totient is φ = 1139560000.

The previous prime is 2145240511. The next prime is 2145240571. The reversal of 2145240525 is 5250425412.

It is not a de Polignac number, because 2145240525 - 2⁴ = 2145240509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2145240492 and 2145240501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38154 + ... + 75803.

It is an arithmetic number, because the mean of its divisors is an integer number (148373316).

Almost surely, 2^2145240525 is an apocalyptic number.

2145240525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145240525 is a deficient number, since it is larger than the sum of its proper divisors (1415719059).

2145240525 is a wasteful number, since it uses less digits than its factorization.

2145240525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114221 (or 114216 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 2145240525 is about 46316.7413037662. The cubic root of 2145240525 is about 1289.7097928995.

Adding to 2145240525 its reverse (5250425412), we get a palindrome (7395665937).

The spelling of 2145240525 in words is "two billion, one hundred forty-five million, two hundred forty thousand, five hundred twenty-five".