131335040 has 32 divisors (see below), whose sum is σ = 313974360. Its totient is φ = 52533760.

The previous prime is 131335027. The next prime is 131335067. The reversal of 131335040 is 40533131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101966 + ... + 103245.

Almost surely, 2^131335040 is an apocalyptic number.

131335040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131335040 is an abundant number, since it is smaller than the sum of its proper divisors (182639320).

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

131335040 is an equidigital number, since it uses as much as digits as its factorization.

131335040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205230 (or 205218 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 131335040 is about 11460.1500862772. The cubic root of 131335040 is about 508.3079126110.

Adding to 131335040 its reverse (40533131), we get a palindrome (171868171).

The spelling of 131335040 in words is "one hundred thirty-one million, three hundred thirty-five thousand, forty".