815025522 has 8 divisors (see below), whose sum is σ = 1630051056. Its totient is φ = 271675172.

The previous prime is 815025503. The next prime is 815025551. The reversal of 815025522 is 225520518.

It is a sphenic number, since it is the product of 3 distinct primes.

815025522 is an admirable number.

It is a super-2 number, since 2×815025522² = 1328533203022744968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 815025522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67918788 + ... + 67918799.

It is an arithmetic number, because the mean of its divisors is an integer number (203756382).

Almost surely, 2^815025522 is an apocalyptic number.

815025522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

815025522 is a wasteful number, since it uses less digits than its factorization.

815025522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135837592.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 815025522 is about 28548.6518420748. The cubic root of 815025522 is about 934.0936137096.

The spelling of 815025522 in words is "eight hundred fifteen million, twenty-five thousand, five hundred twenty-two".