13181332 has 6 divisors (see below), whose sum is σ = 23067338. Its totient is φ = 6590664.

The previous prime is 13181317. The next prime is 13181347. The reversal of 13181332 is 23318131.

It is an interprime number because it is at equal distance from previous prime (13181317) and next prime (13181347).

It can be written as a sum of positive squares in only one way, i.e., 9036036 + 4145296 = 3006^2 + 2036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1647663 + ... + 1647670.

Almost surely, 2^13181332 is an apocalyptic number.

It is an amenable number.

13181332 is a deficient number, since it is larger than the sum of its proper divisors (9886006).

13181332 is a wasteful number, since it uses less digits than its factorization.

13181332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295337 (or 3295335 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 13181332 is about 3630.6104169960. The cubic root of 13181332 is about 236.2216867425.

Adding to 13181332 its reverse (23318131), we get a palindrome (36499463).

The spelling of 13181332 in words is "thirteen million, one hundred eighty-one thousand, three hundred thirty-two".