12785528131 has 8 divisors (see below), whose sum is σ = 12968100864. Its totient is φ = 12603024840.

The previous prime is 12785528117. The next prime is 12785528143. The reversal of 12785528131 is 13182558721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12785528131 - 2¹⁷ = 12785397059 is a prime.

It is a super-2 number, since 2×12785528131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12785528101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437916 + ... + 466198.

It is an arithmetic number, because the mean of its divisors is an integer number (1621012608).

Almost surely, 2^12785528131 is an apocalyptic number.

12785528131 is a deficient number, since it is larger than the sum of its proper divisors (182572733).

12785528131 is an equidigital number, since it uses as much as digits as its factorization.

12785528131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34721.

The product of its digits is 134400, while the sum is 43.

The spelling of 12785528131 in words is "twelve billion, seven hundred eighty-five million, five hundred twenty-eight thousand, one hundred thirty-one".