131671541 has 4 divisors (see below), whose sum is σ = 134883084. Its totient is φ = 128460000.

The previous prime is 131671537. The next prime is 131671543. The reversal of 131671541 is 145176131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38626225 + 93045316 = 6215^2 + 9646^2 .

It is a cyclic number.

It is not a de Polignac number, because 131671541 - 2² = 131671537 is a prime.

It is a super-3 number, since 3×131671541³ (a number of 25 digits) contains 333 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 (131671543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605710 + ... + 1605791.

It is an arithmetic number, because the mean of its divisors is an integer number (33720771).

Almost surely, 2^131671541 is an apocalyptic number.

It is an amenable number.

131671541 is a deficient number, since it is larger than the sum of its proper divisors (3211543).

131671541 is an equidigital number, since it uses as much as digits as its factorization.

131671541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211542.

The product of its digits is 2520, while the sum is 29.

The square root of 131671541 is about 11474.8220465504. The cubic root of 131671541 is about 508.7416639443.

The spelling of 131671541 in words is "one hundred thirty-one million, six hundred seventy-one thousand, five hundred forty-one".