157171015521 has 48 divisors (see below), whose sum is σ = 252256979520. Its totient is φ = 96673824000.

The previous prime is 157171015487. The next prime is 157171015541. The reversal of 157171015521 is 125510171751.

157171015521 is a `hidden beast` number, since 1 + 57 + 1 + 71 + 0 + 15 + 521 = 666.

157171015521 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 157171015521 - 2⁹ = 157171015009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157171015541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11021646 + ... + 11035896.

It is an arithmetic number, because the mean of its divisors is an integer number (5255353740).

Almost surely, 2^157171015521 is an apocalyptic number.

It is an amenable number.

157171015521 is a deficient number, since it is larger than the sum of its proper divisors (95085963999).

157171015521 is a wasteful number, since it uses less digits than its factorization.

157171015521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16703 (or 16684 counting only the distinct ones).

The product of its (nonzero) digits is 12250, while the sum is 36.

The spelling of 157171015521 in words is "one hundred fifty-seven billion, one hundred seventy-one million, fifteen thousand, five hundred twenty-one".