131320601520 has 40 divisors (see below), whose sum is σ = 407093865456. Its totient is φ = 35018827008.

The previous prime is 131320601473. The next prime is 131320601557. The reversal of 131320601520 is 25106023131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 273584347 + ... + 273584826.

Almost surely, 2^131320601520 is an apocalyptic number.

131320601520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131320601520 is an abundant number, since it is smaller than the sum of its proper divisors (275773263936).

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

131320601520 is a wasteful number, since it uses less digits than its factorization.

131320601520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547169189 (or 547169183 counting only the distinct ones).

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

Adding to 131320601520 its reverse (25106023131), we get a palindrome (156426624651).

The spelling of 131320601520 in words is "one hundred thirty-one billion, three hundred twenty million, six hundred one thousand, five hundred twenty".