12157343531 has 8 divisors (see below), whose sum is σ = 12275567280. Its totient is φ = 12039205248.

The previous prime is 12157343491. The next prime is 12157343537. The reversal of 12157343531 is 13534375121.

12157343531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12157343531 is a prime.

It is a super-2 number, since 2×12157343531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12157343491 and 12157343500.

It is not an unprimeable number, because it can be changed into a prime (12157343537) 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 7 ways as a sum of consecutive naturals, for example, 285815 + ... + 325583.

It is an arithmetic number, because the mean of its divisors is an integer number (1534445910).

Almost surely, 2^12157343531 is an apocalyptic number.

12157343531 is a deficient number, since it is larger than the sum of its proper divisors (118223749).

12157343531 is a wasteful number, since it uses less digits than its factorization.

12157343531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42733.

The product of its digits is 37800, while the sum is 35.

The spelling of 12157343531 in words is "twelve billion, one hundred fifty-seven million, three hundred forty-three thousand, five hundred thirty-one".