131320321550 has 96 divisors (see below), whose sum is σ = 276151075200. Its totient is φ = 46022256000.

The previous prime is 131320321547. The next prime is 131320321553. The reversal of 131320321550 is 55123023131.

It is an interprime number because it is at equal distance from previous prime (131320321547) and next prime (131320321553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320321553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9100241 + ... + 9114659.

It is an arithmetic number, because the mean of its divisors is an integer number (2876573700).

Almost surely, 2^131320321550 is an apocalyptic number.

131320321550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131320321550 is an abundant number, since it is smaller than the sum of its proper divisors (144830753650).

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

131320321550 is a wasteful number, since it uses less digits than its factorization.

131320321550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15042 (or 15037 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 131320321550 its reverse (55123023131), we get a palindrome (186443344681).

The spelling of 131320321550 in words is "one hundred thirty-one billion, three hundred twenty million, three hundred twenty-one thousand, five hundred fifty".