131320577550 has 24 divisors (see below), whose sum is σ = 325675032696. Its totient is φ = 35018820640.

The previous prime is 131320577543. The next prime is 131320577587. The reversal of 131320577550 is 55775023131.

It is a junction number, because it is equal to n+sod(n) for n = 131320577499 and 131320577508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437735109 + ... + 437735408.

It is an arithmetic number, because the mean of its divisors is an integer number (13569793029).

Almost surely, 2^131320577550 is an apocalyptic number.

131320577550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131320577550 is an abundant number, since it is smaller than the sum of its proper divisors (194354455146).

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

131320577550 is a wasteful number, since it uses less digits than its factorization.

131320577550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875470532 (or 875470527 counting only the distinct ones).

The product of its (nonzero) digits is 110250, while the sum is 39.

The spelling of 131320577550 in words is "one hundred thirty-one billion, three hundred twenty million, five hundred seventy-seven thousand, five hundred fifty".