13002181 has 2 divisors, whose sum is σ = 13002182. Its totient is φ = 13002180.

The previous prime is 13002173. The next prime is 13002193. The reversal of 13002181 is 18120031.

13002181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 4879681 = 2850^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 13002181 - 2³ = 13002173 is a prime.

It is a super-2 number, since 2×13002181² = 338113421513522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13002131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6501090 + 6501091.

It is an arithmetic number, because the mean of its divisors is an integer number (6501091).

Almost surely, 2^13002181 is an apocalyptic number.

It is an amenable number.

13002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13002181 is an equidigital number, since it uses as much as digits as its factorization.

13002181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 13002181 is about 3605.8537130616. The cubic root of 13002181 is about 235.1466174239.

It can be divided in two parts, 1300 and 2181, that added together give a square (3481 = 59²).

The spelling of 13002181 in words is "thirteen million, two thousand, one hundred eighty-one".