2166713523 has 32 divisors (see below), whose sum is σ = 3478164480. Its totient is φ = 1325147040.

The previous prime is 2166713501. The next prime is 2166713531. The reversal of 2166713523 is 3253176612.

2166713523 is a `hidden beast` number, since 2 + 1 + 66 + 71 + 3 + 523 = 666.

It is not a de Polignac number, because 2166713523 - 2⁵ = 2166713491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166713573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38278 + ... + 76148.

It is an arithmetic number, because the mean of its divisors is an integer number (108692640).

Almost surely, 2^2166713523 is an apocalyptic number.

2166713523 is a deficient number, since it is larger than the sum of its proper divisors (1311450957).

2166713523 is a wasteful number, since it uses less digits than its factorization.

2166713523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38056 (or 38050 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 2166713523 is about 46547.9701276006. The cubic root of 2166713523 is about 1293.9986739800.

The spelling of 2166713523 in words is "two billion, one hundred sixty-six million, seven hundred thirteen thousand, five hundred twenty-three".