8520172133 has 16 divisors (see below), whose sum is σ = 9500016960. Its totient is φ = 7575964800.

The previous prime is 8520172117. The next prime is 8520172163. The reversal of 8520172133 is 3312710258.

It is a cyclic number.

It is not a de Polignac number, because 8520172133 - 2⁴ = 8520172117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8520172133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8520172163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84641 + ... + 155577.

It is an arithmetic number, because the mean of its divisors is an integer number (593751060).

Almost surely, 2^8520172133 is an apocalyptic number.

It is an amenable number.

8520172133 is a deficient number, since it is larger than the sum of its proper divisors (979844827).

8520172133 is a wasteful number, since it uses less digits than its factorization.

8520172133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71188.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 8520172133 is about 92304.7784949403. The cubic root of 8520172133 is about 2042.4407008118.

The spelling of 8520172133 in words is "eight billion, five hundred twenty million, one hundred seventy-two thousand, one hundred thirty-three".