131333440 has 56 divisors (see below), whose sum is σ = 357420672. Its totient is φ = 45027840.

The previous prime is 131333437. The next prime is 131333443. The reversal of 131333440 is 44333131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131333437) and next prime (131333443).

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131333443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27076 + ... + 31555.

It is an arithmetic number, because the mean of its divisors is an integer number (6382512).

Almost surely, 2^131333440 is an apocalyptic number.

131333440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131333440 is an abundant number, since it is smaller than the sum of its proper divisors (226087232).

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

131333440 is an equidigital number, since it uses as much as digits as its factorization.

131333440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58655 (or 58645 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 131333440 is about 11460.0802789509. The cubic root of 131333440 is about 508.3058484348.

Adding to 131333440 its reverse (44333131), we get a palindrome (175666571).

The spelling of 131333440 in words is "one hundred thirty-one million, three hundred thirty-three thousand, four hundred forty".