4000520525 has 12 divisors (see below), whose sum is σ = 5176326432. Its totient is φ = 3061267440.

The previous prime is 4000520521. The next prime is 4000520539. The reversal of 4000520525 is 5250250004.

It is not a de Polignac number, because 4000520525 - 2² = 4000520521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4000520525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000520521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3478139 + ... + 3479288.

It is an arithmetic number, because the mean of its divisors is an integer number (431360536).

Almost surely, 2^4000520525 is an apocalyptic number.

It is an amenable number.

4000520525 is a deficient number, since it is larger than the sum of its proper divisors (1175805907).

4000520525 is a wasteful number, since it uses less digits than its factorization.

4000520525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6957460 (or 6957455 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 4000520525 is about 63249.6681809478. The cubic root of 4000520525 is about 1587.4699058093.

Adding to 4000520525 its reverse (5250250004), we get a palindrome (9250770529).

The spelling of 4000520525 in words is "four billion, five hundred twenty thousand, five hundred twenty-five".