131571721064 has 16 divisors (see below), whose sum is σ = 281939402400. Its totient is φ = 56387880432.

The previous prime is 131571720989. The next prime is 131571721079. The reversal of 131571721064 is 460127175131.

It is a happy number.

It is a super-3 number, since 3×131571721064³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174747454 + ... + 1174747565.

It is an arithmetic number, because the mean of its divisors is an integer number (17621212650).

Almost surely, 2^131571721064 is an apocalyptic number.

131571721064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131571721064 is an abundant number, since it is smaller than the sum of its proper divisors (150367681336).

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

131571721064 is a wasteful number, since it uses less digits than its factorization.

131571721064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349495032 (or 2349495028 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

Adding to 131571721064 its reverse (460127175131), we get a palindrome (591698896195).

The spelling of 131571721064 in words is "one hundred thirty-one billion, five hundred seventy-one million, seven hundred twenty-one thousand, sixty-four".