123503503131 has 12 divisors (see below), whose sum is σ = 178440540408. Its totient is φ = 82314165024.

The previous prime is 123503503117. The next prime is 123503503139. The reversal of 123503503131 is 131305305321.

123503503131 is a `hidden beast` number, since 1 + 23 + 5 + 0 + 3 + 503 + 131 = 666.

It is not a de Polignac number, because 123503503131 - 2¹⁹ = 123502978843 is a prime.

It is a super-2 number, since 2×123503503131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123503503095 and 123503503104.

It is not an unprimeable number, because it can be changed into a prime (123503503139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1755565 + ... + 1824558.

It is an arithmetic number, because the mean of its divisors is an integer number (14870045034).

Almost surely, 2^123503503131 is an apocalyptic number.

123503503131 is a deficient number, since it is larger than the sum of its proper divisors (54937037277).

123503503131 is a wasteful number, since it uses less digits than its factorization.

123503503131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583962 (or 3583959 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

Adding to 123503503131 its reverse (131305305321), we get a palindrome (254808808452).

The spelling of 123503503131 in words is "one hundred twenty-three billion, five hundred three million, five hundred three thousand, one hundred thirty-one".