11451510221525 has 48 divisors (see below), whose sum is σ = 16454733579648. Its totient is φ = 7813261824000.

The previous prime is 11451510221447. The next prime is 11451510221579. The reversal of 11451510221525 is 52512201515411.

It is a happy number.

11451510221525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11451510221525 - 2⁸ = 11451510221269 is a prime.

It is a super-2 number, since 2×11451510221525² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2484212 + ... + 5392061.

It is an arithmetic number, because the mean of its divisors is an integer number (342806949576).

Almost surely, 2^{11451510221525} is an apocalyptic number.

It is an amenable number.

11451510221525 is a deficient number, since it is larger than the sum of its proper divisors (5003223358123).

11451510221525 is a wasteful number, since it uses less digits than its factorization.

11451510221525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876622 (or 7876617 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 35.

Adding to 11451510221525 its reverse (52512201515411), we get a palindrome (63963711736936).

The spelling of 11451510221525 in words is "eleven trillion, four hundred fifty-one billion, five hundred ten million, two hundred twenty-one thousand, five hundred twenty-five".