131538909700 has 72 divisors (see below), whose sum is σ = 315774414144. Its totient is φ = 47158608000.

The previous prime is 131538909643. The next prime is 131538909707. The reversal of 131538909700 is 7909835131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131538909707) 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, 764019 + ... + 920218.

It is an arithmetic number, because the mean of its divisors is an integer number (4385755752).

Almost surely, 2^131538909700 is an apocalyptic number.

131538909700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131538909700 is an abundant number, since it is smaller than the sum of its proper divisors (184235504444).

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

131538909700 is a wasteful number, since it uses less digits than its factorization.

131538909700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684333 (or 1684326 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 131538909700 in words is "one hundred thirty-one billion, five hundred thirty-eight million, nine hundred nine thousand, seven hundred".