13531229 has 2 divisors, whose sum is σ = 13531230. Its totient is φ = 13531228.

The previous prime is 13531183. The next prime is 13531277. The reversal of 13531229 is 92213531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 2968729 = 3250^2 + 1723^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531229 - 2¹⁶ = 13465693 is a prime.

It is equal to p₈₈₁₅₂₂ and since 13531229 and 881522 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 13531198 and 13531207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13531129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765614 + 6765615.

It is an arithmetic number, because the mean of its divisors is an integer number (6765615).

Almost surely, 2^13531229 is an apocalyptic number.

It is an amenable number.

13531229 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531229 is an equidigital number, since it uses as much as digits as its factorization.

13531229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 13531229 is about 3678.4818879532. The cubic root of 13531229 is about 238.2936199118.

The spelling of 13531229 in words is "thirteen million, five hundred thirty-one thousand, two hundred twenty-nine".