12501143531 has 4 divisors (see below), whose sum is σ = 12502511112. Its totient is φ = 12499775952.

The previous prime is 12501143513. The next prime is 12501143561. The reversal of 12501143531 is 13534110521.

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 12501143531 - 2¹⁴ = 12501127147 is a prime.

It is a super-2 number, since 2×12501143531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12501143531.

It is not an unprimeable number, because it can be changed into a prime (12501143561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669986 + ... + 688391.

It is an arithmetic number, because the mean of its divisors is an integer number (3125627778).

Almost surely, 2^12501143531 is an apocalyptic number.

12501143531 is a deficient number, since it is larger than the sum of its proper divisors (1367581).

12501143531 is an equidigital number, since it uses as much as digits as its factorization.

12501143531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367580.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 12501143531 in words is "twelve billion, five hundred one million, one hundred forty-three thousand, five hundred thirty-one".