12423540332531 has 16 divisors (see below), whose sum is σ = 13070071872000. Its totient is φ = 11796729449568.

The previous prime is 12423540332521. The next prime is 12423540332537. The reversal of 12423540332531 is 13523304532421.

It is a cyclic number.

It is not a de Polignac number, because 12423540332531 - 2⁴² = 8025493821427 is a prime.

It is a super-2 number, since 2×12423540332531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12423540332537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20327141 + ... + 20929398.

It is an arithmetic number, because the mean of its divisors is an integer number (816879492000).

Almost surely, 2^{12423540332531} is an apocalyptic number.

12423540332531 is a deficient number, since it is larger than the sum of its proper divisors (646531539469).

12423540332531 is a wasteful number, since it uses less digits than its factorization.

12423540332531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41256778.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 12423540332531 its reverse (13523304532421), we get a palindrome (25946844864952).

The spelling of 12423540332531 in words is "twelve trillion, four hundred twenty-three billion, five hundred forty million, three hundred thirty-two thousand, five hundred thirty-one".