8212905523 has 4 divisors (see below), whose sum is σ = 8213213200. Its totient is φ = 8212597848.

The previous prime is 8212905521. The next prime is 8212905539. The reversal of 8212905523 is 3255092128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8212905523 - 2¹ = 8212905521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8212905521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109548 + ... + 168601.

It is an arithmetic number, because the mean of its divisors is an integer number (2053303300).

Almost surely, 2^8212905523 is an apocalyptic number.

8212905523 is a deficient number, since it is larger than the sum of its proper divisors (307677).

8212905523 is a wasteful number, since it uses less digits than its factorization.

8212905523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307676.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 8212905523 is about 90625.0821958248. The cubic root of 8212905523 is about 2017.5870219360.

The spelling of 8212905523 in words is "eight billion, two hundred twelve million, nine hundred five thousand, five hundred twenty-three".