11215251525 has 12 divisors (see below), whose sum is σ = 18542549312. Its totient is φ = 5981467440.

The previous prime is 11215251521. The next prime is 11215251533. The reversal of 11215251525 is 52515251211.

It is not a de Polignac number, because 11215251525 - 2² = 11215251521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11215251492 and 11215251501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215251521) 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, 74768269 + ... + 74768418.

Almost surely, 2^11215251525 is an apocalyptic number.

11215251525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11215251525 is a deficient number, since it is larger than the sum of its proper divisors (7327297787).

11215251525 is a wasteful number, since it uses less digits than its factorization.

11215251525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149536700 (or 149536695 counting only the distinct ones).

The product of its digits is 5000, while the sum is 30.

The spelling of 11215251525 in words is "eleven billion, two hundred fifteen million, two hundred fifty-one thousand, five hundred twenty-five".