131005173018 has 16 divisors (see below), whose sum is σ = 264711484800. Its totient is φ = 43218201216.

The previous prime is 131005172983. The next prime is 131005173031. The reversal of 131005173018 is 810371500131.

It is a super-2 number, since 2×131005173018² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112546818 + ... + 112547981.

It is an arithmetic number, because the mean of its divisors is an integer number (16544467800).

Almost surely, 2^131005173018 is an apocalyptic number.

131005173018 is an abundant number, since it is smaller than the sum of its proper divisors (133706311782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131005173018 is a wasteful number, since it uses less digits than its factorization.

131005173018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225094901.

The product of its (nonzero) digits is 2520, while the sum is 30.

Adding to 131005173018 its reverse (810371500131), we get a palindrome (941376673149).

The spelling of 131005173018 in words is "one hundred thirty-one billion, five million, one hundred seventy-three thousand, eighteen".