13152231 has 6 divisors (see below), whose sum is σ = 18997680. Its totient is φ = 8768148.

The previous prime is 13152229. The next prime is 13152239. The reversal of 13152231 is 13225131.

It is not a de Polignac number, because 13152231 - 2¹ = 13152229 is a prime.

It is a super-2 number, since 2×13152231² = 345962360554722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13152239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730671 + ... + 730688.

It is an arithmetic number, because the mean of its divisors is an integer number (3166280).

Almost surely, 2^13152231 is an apocalyptic number.

13152231 is a deficient number, since it is larger than the sum of its proper divisors (5845449).

13152231 is a wasteful number, since it uses less digits than its factorization.

13152231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461365 (or 1461362 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 13152231 is about 3626.6004742734. The cubic root of 13152231 is about 236.0477196906.

Adding to 13152231 its reverse (13225131), we get a palindrome (26377362).

Subtracting 13152231 from its reverse (13225131), we obtain a square (72900 = 270²).

The spelling of 13152231 in words is "thirteen million, one hundred fifty-two thousand, two hundred thirty-one".