11531525 has 24 divisors (see below), whose sum is σ = 15516864. Its totient is φ = 8467200.

The previous prime is 11531521. The next prime is 11531539. The reversal of 11531525 is 52513511.

It is a happy number.

It is not a de Polignac number, because 11531525 - 2² = 11531521 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 11531525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17960 + ... + 18590.

It is an arithmetic number, because the mean of its divisors is an integer number (646536).

Almost surely, 2^11531525 is an apocalyptic number.

It is an amenable number.

11531525 is a deficient number, since it is larger than the sum of its proper divisors (3985339).

11531525 is a wasteful number, since it uses less digits than its factorization.

11531525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 696 counting only the distinct ones).

The product of its digits is 750, while the sum is 23.

The square root of 11531525 is about 3395.8099181197. The cubic root of 11531525 is about 225.9239373865.

The spelling of 11531525 in words is "eleven million, five hundred thirty-one thousand, five hundred twenty-five".