12531319 has 4 divisors (see below), whose sum is σ = 12597120. Its totient is φ = 12465520.

The previous prime is 12531313. The next prime is 12531331. The reversal of 12531319 is 91313521.

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 12531319 - 2⁷ = 12531191 is a prime.

It is a super-2 number, since 2×12531319² = 314067911759522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12531293 and 12531302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32614 + ... + 32995.

It is an arithmetic number, because the mean of its divisors is an integer number (3149280).

Almost surely, 2^12531319 is an apocalyptic number.

12531319 is a deficient number, since it is larger than the sum of its proper divisors (65801).

12531319 is an equidigital number, since it uses as much as digits as its factorization.

12531319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65800.

The product of its digits is 810, while the sum is 25.

The square root of 12531319 is about 3539.9603105120. The cubic root of 12531319 is about 232.2731065877.

The spelling of 12531319 in words is "twelve million, five hundred thirty-one thousand, three hundred nineteen".