13231066 has 8 divisors (see below), whose sum is σ = 21014100. Its totient is φ = 6226368.

The previous prime is 13231061. The next prime is 13231067. The reversal of 13231066 is 66013231.

It can be written as a sum of positive squares in 2 ways, for example, as 11189025 + 2042041 = 3345^2 + 1429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13231066² = 350122214992712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13231061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194541 + ... + 194608.

Almost surely, 2^13231066 is an apocalyptic number.

13231066 is a deficient number, since it is larger than the sum of its proper divisors (7783034).

13231066 is a wasteful number, since it uses less digits than its factorization.

13231066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389168.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13231066 is about 3637.4532299399. The cubic root of 13231066 is about 236.5184069990.

Adding to 13231066 its reverse (66013231), we get a palindrome (79244297).

The spelling of 13231066 in words is "thirteen million, two hundred thirty-one thousand, sixty-six".