815196525 has 96 divisors (see below), whose sum is σ = 1638645120. Its totient is φ = 352128000.

The previous prime is 815196449. The next prime is 815196527. The reversal of 815196525 is 525691518.

It is a happy number.

It is not a de Polignac number, because 815196525 - 2⁸ = 815196269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815196527) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 309715 + ... + 312335.

It is an arithmetic number, because the mean of its divisors is an integer number (17069220).

Almost surely, 2^815196525 is an apocalyptic number.

It is an amenable number.

815196525 is an abundant number, since it is smaller than the sum of its proper divisors (823448595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815196525 is a wasteful number, since it uses less digits than its factorization.

815196525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687 (or 2682 counting only the distinct ones).

The product of its digits is 108000, while the sum is 42.

The square root of 815196525 is about 28551.6466250197. The cubic root of 815196525 is about 934.1589374882.

The spelling of 815196525 in words is "eight hundred fifteen million, one hundred ninety-six thousand, five hundred twenty-five".