131558381 has 8 divisors (see below), whose sum is σ = 134918784. Its totient is φ = 128205280.

The previous prime is 131558279. The next prime is 131558407. The reversal of 131558381 is 183855131.

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

It is a cyclic number.

It is not a de Polignac number, because 131558381 - 2²² = 127364077 is a prime.

It is a super-2 number, since 2×131558381² = 34615215222682322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131558081) 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, 63890 + ... + 65916.

It is an arithmetic number, because the mean of its divisors is an integer number (16864848).

Almost surely, 2^131558381 is an apocalyptic number.

It is an amenable number.

131558381 is a deficient number, since it is larger than the sum of its proper divisors (3360403).

131558381 is a wasteful number, since it uses less digits than its factorization.

131558381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651.

The product of its digits is 14400, while the sum is 35.

The square root of 131558381 is about 11469.8901912791. The cubic root of 131558381 is about 508.5958827426.

The spelling of 131558381 in words is "one hundred thirty-one million, five hundred fifty-eight thousand, three hundred eighty-one".