12355240031 has 4 divisors (see below), whose sum is σ = 12470709672. Its totient is φ = 12239770392.

The previous prime is 12355240019. The next prime is 12355240033. The reversal of 12355240031 is 13004255321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12355240031 is a prime.

It is a super-2 number, since 2×12355240031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12355240033) 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, 57734660 + ... + 57734873.

It is an arithmetic number, because the mean of its divisors is an integer number (3117677418).

Almost surely, 2^12355240031 is an apocalyptic number.

12355240031 is a deficient number, since it is larger than the sum of its proper divisors (115469641).

12355240031 is a wasteful number, since it uses less digits than its factorization.

12355240031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115469640.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 12355240031 its reverse (13004255321), we get a palindrome (25359495352).

The spelling of 12355240031 in words is "twelve billion, three hundred fifty-five million, two hundred forty thousand, thirty-one".