123403510131 has 16 divisors (see below), whose sum is σ = 181173552768. Its totient is φ = 74091032000.

The previous prime is 123403510127. The next prime is 123403510133. The reversal of 123403510131 is 131015304321.

It is a cyclic number.

It is not a de Polignac number, because 123403510131 - 2² = 123403510127 is a prime.

It is a super-2 number, since 2×123403510131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123403510133) 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, 17470770 + ... + 17477831.

It is an arithmetic number, because the mean of its divisors is an integer number (11323347048).

Almost surely, 2^123403510131 is an apocalyptic number.

123403510131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123403510131 is a deficient number, since it is larger than the sum of its proper divisors (57770042637).

123403510131 is a wasteful number, since it uses less digits than its factorization.

123403510131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34948722.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 123403510131 its reverse (131015304321), we get a palindrome (254418814452).

The spelling of 123403510131 in words is "one hundred twenty-three billion, four hundred three million, five hundred ten thousand, one hundred thirty-one".