13400231 has 4 divisors (see below), whose sum is σ = 14431032. Its totient is φ = 12369432.

The previous prime is 13400227. The next prime is 13400239. The reversal of 13400231 is 13200431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13400231 - 2² = 13400227 is a prime.

It is a super-2 number, since 2×13400231² = 359132381706722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13400239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515381 + ... + 515406.

It is an arithmetic number, because the mean of its divisors is an integer number (3607758).

Almost surely, 2^13400231 is an apocalyptic number.

13400231 is a deficient number, since it is larger than the sum of its proper divisors (1030801).

13400231 is a wasteful number, since it uses less digits than its factorization.

13400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030800.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13400231 is about 3660.6325956042. The cubic root of 13400231 is about 237.5221386565.

Adding to 13400231 its reverse (13200431), we get a palindrome (26600662).

It can be divided in two parts, 13400 and 231, that added together give a palindrome (13631).

The spelling of 13400231 in words is "thirteen million, four hundred thousand, two hundred thirty-one".