131405718 has 8 divisors (see below), whose sum is σ = 262811448. Its totient is φ = 43801904.

The previous prime is 131405717. The next prime is 131405719. The reversal of 131405718 is 817504131.

It is an interprime number because it is at equal distance from previous prime (131405717) and next prime (131405719).

It is a sphenic number, since it is the product of 3 distinct primes.

131405718 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131405717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10950471 + ... + 10950482.

It is an arithmetic number, because the mean of its divisors is an integer number (32851431).

Almost surely, 2^131405718 is an apocalyptic number.

131405718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131405718 is a wasteful number, since it uses less digits than its factorization.

131405718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21900958.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 131405718 is about 11463.2333135115. The cubic root of 131405718 is about 508.3990782892.

Adding to 131405718 its reverse (817504131), we get a palindrome (948909849).

The spelling of 131405718 in words is "one hundred thirty-one million, four hundred five thousand, seven hundred eighteen".