131909020 has 24 divisors (see below), whose sum is σ = 291589200. Its totient is φ = 49986432.

The previous prime is 131909017. The next prime is 131909051. The reversal of 131909020 is 20909131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173185 + ... + 173944.

It is an arithmetic number, because the mean of its divisors is an integer number (12149550).

Almost surely, 2^131909020 is an apocalyptic number.

131909020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131909020 is an abundant number, since it is smaller than the sum of its proper divisors (159680180).

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

131909020 is a wasteful number, since it uses less digits than its factorization.

131909020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347157 (or 347155 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 131909020 is about 11485.1652143102. The cubic root of 131909020 is about 509.0473308593.

The spelling of 131909020 in words is "one hundred thirty-one million, nine hundred nine thousand, twenty".