131405568 has 72 divisors (see below), whose sum is σ = 399708288. Its totient is φ = 37542912.

The previous prime is 131405551. The next prime is 131405569. The reversal of 131405568 is 865504131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131405569) 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, 6846 + ... + 17597.

It is an arithmetic number, because the mean of its divisors is an integer number (5551504).

Almost surely, 2^131405568 is an apocalyptic number.

It is an amenable number.

131405568 is an abundant number, since it is smaller than the sum of its proper divisors (268302720).

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

131405568 is an equidigital number, since it uses as much as digits as its factorization.

131405568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24469 (or 24455 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 131405568 is about 11463.2267708530. The cubic root of 131405568 is about 508.3988848428.

Adding to 131405568 its reverse (865504131), we get a palindrome (996909699).

The spelling of 131405568 in words is "one hundred thirty-one million, four hundred five thousand, five hundred sixty-eight".