131550204420 has 72 divisors (see below), whose sum is σ = 399944825280. Its totient is φ = 35000124480.

The previous prime is 131550204403. The next prime is 131550204427. The reversal of 131550204420 is 24402055131.

131550204420 is a `hidden beast` number, since 1 + 31 + 5 + 5 + 0 + 204 + 420 = 666.

It is not an unprimeable number, because it can be changed into a prime (131550204427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753366 + ... + 911405.

It is an arithmetic number, because the mean of its divisors is an integer number (5554789240).

Almost surely, 2^131550204420 is an apocalyptic number.

131550204420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131550204420 is an abundant number, since it is smaller than the sum of its proper divisors (268394620860).

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

131550204420 is a wasteful number, since it uses less digits than its factorization.

131550204420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665225 (or 1665220 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 131550204420 its reverse (24402055131), we get a palindrome (155952259551).

The spelling of 131550204420 in words is "one hundred thirty-one billion, five hundred fifty million, two hundred four thousand, four hundred twenty".