31517446123 has 24 divisors (see below), whose sum is σ = 34740856800. Its totient is φ = 28553054208.

The previous prime is 31517446099. The next prime is 31517446133. The reversal of 31517446123 is 32164471513.

It is a happy number.

It is not a de Polignac number, because 31517446123 - 2⁵ = 31517446091 is a prime.

It is a super-2 number, since 2×31517446123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31517446133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2818818 + ... + 2829976.

It is an arithmetic number, because the mean of its divisors is an integer number (1447535700).

Almost surely, 2^31517446123 is an apocalyptic number.

31517446123 is a deficient number, since it is larger than the sum of its proper divisors (3223410677).

31517446123 is a wasteful number, since it uses less digits than its factorization.

31517446123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11559 (or 11542 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The spelling of 31517446123 in words is "thirty-one billion, five hundred seventeen million, four hundred forty-six thousand, one hundred twenty-three".