2013166537321 has 9 divisors (see below), whose sum is σ = 2028838849149. Its totient is φ = 1997614401900.

The previous prime is 2013166537231. The next prime is 2013166537331. The reversal of 2013166537321 is 1237356613102.

The square root of 2013166537321 is 1418861.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2013166537321 - 2¹¹ = 2013166535273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2013166537331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 185865376 + ... + 185876206.

Almost surely, 2^{2013166537321} is an apocalyptic number.

2013166537321 is the 1418861-st square number.

2013166537321 is the 709431-st centered octagonal number.

It is an amenable number.

2013166537321 is a deficient number, since it is larger than the sum of its proper divisors (15672311828).

2013166537321 is an frugal number, since it uses more digits than its factorization.

2013166537321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21924 (or 10962 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 2013166537321 in words is "two trillion, thirteen billion, one hundred sixty-six million, five hundred thirty-seven thousand, three hundred twenty-one".