5181321 has 16 divisors (see below), whose sum is σ = 7139520. Its totient is φ = 3340800.

The previous prime is 5181317. The next prime is 5181347. The reversal of 5181321 is 1231815.

It is not a de Polignac number, because 5181321 - 2² = 5181317 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181301) 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, 12721 + ... + 13121.

It is an arithmetic number, because the mean of its divisors is an integer number (446220).

Almost surely, 2^5181321 is an apocalyptic number.

It is an amenable number.

5181321 is a deficient number, since it is larger than the sum of its proper divisors (1958199).

5181321 is a wasteful number, since it uses less digits than its factorization.

5181321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its digits is 240, while the sum is 21.

The square root of 5181321 is about 2276.2515238875. The cubic root of 5181321 is about 173.0401301316.

The spelling of 5181321 in words is "five million, one hundred eighty-one thousand, three hundred twenty-one".