12531400530 has 64 divisors (see below), whose sum is σ = 32865326208. Its totient is φ = 3032744960.

The previous prime is 12531400513. The next prime is 12531400547. The reversal of 12531400530 is 3500413521.

It is an interprime number because it is at equal distance from previous prime (12531400513) and next prime (12531400547).

It is a self number, because there is not a number n which added to its sum of digits gives 12531400530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163672 + ... + 227708.

It is an arithmetic number, because the mean of its divisors is an integer number (513520722).

Almost surely, 2^12531400530 is an apocalyptic number.

12531400530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12531400530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16432663104).

12531400530 is an abundant number, since it is smaller than the sum of its proper divisors (20333925678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12531400530 is a wasteful number, since it uses less digits than its factorization.

12531400530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64651.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 12531400530 in words is "twelve billion, five hundred thirty-one million, four hundred thousand, five hundred thirty".