13393231 has 2 divisors, whose sum is σ = 13393232. Its totient is φ = 13393230.

The previous prime is 13393189. The next prime is 13393267. The reversal of 13393231 is 13239331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13393231 - 2⁷ = 13393103 is a prime.

It is a super-2 number, since 2×13393231² = 358757273238722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13393196 and 13393205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13393631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6696615 + 6696616.

It is an arithmetic number, because the mean of its divisors is an integer number (6696616).

Almost surely, 2^13393231 is an apocalyptic number.

13393231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13393231 is an equidigital number, since it uses as much as digits as its factorization.

13393231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 25.

The square root of 13393231 is about 3659.6763518104. The cubic root of 13393231 is about 237.4807725893.

It can be divided in two parts, 13 and 393231, that multiplied together give a triangular number (5112003 = T₃₁₉₇).

The spelling of 13393231 in words is "thirteen million, three hundred ninety-three thousand, two hundred thirty-one".