131351225520 has 80 divisors (see below), whose sum is σ = 408982752000. Its totient is φ = 34872675072.

The previous prime is 131351225513. The next prime is 131351225521. The reversal of 131351225520 is 25522153131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (131351225521) 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, 1151020 + ... + 1259979.

It is an arithmetic number, because the mean of its divisors is an integer number (5112284400).

Almost surely, 2^131351225520 is an apocalyptic number.

131351225520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131351225520 is an abundant number, since it is smaller than the sum of its proper divisors (277631526480).

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

131351225520 is a wasteful number, since it uses less digits than its factorization.

131351225520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411242 (or 2411236 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 131351225520 its reverse (25522153131), we get a palindrome (156873378651).

The spelling of 131351225520 in words is "one hundred thirty-one billion, three hundred fifty-one million, two hundred twenty-five thousand, five hundred twenty".