12531231463 has 12 divisors (see below), whose sum is σ = 13020223944. Its totient is φ = 12059830800.

The previous prime is 12531231439. The next prime is 12531231487. The reversal of 12531231463 is 36413213521.

It is an interprime number because it is at equal distance from previous prime (12531231439) and next prime (12531231487).

It is not a de Polignac number, because 12531231463 - 2⁹ = 12531230951 is a prime.

It is a super-2 number, since 2×12531231463² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531231413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137920 + ... + 209962.

It is an arithmetic number, because the mean of its divisors is an integer number (1085018662).

Almost surely, 2^12531231463 is an apocalyptic number.

12531231463 is a deficient number, since it is larger than the sum of its proper divisors (488992481).

12531231463 is an equidigital number, since it uses as much as digits as its factorization.

12531231463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72286 (or 72255 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

Adding to 12531231463 its reverse (36413213521), we get a palindrome (48944444984).

The spelling of 12531231463 in words is "twelve billion, five hundred thirty-one million, two hundred thirty-one thousand, four hundred sixty-three".