131631541 has 4 divisors (see below), whose sum is σ = 131661952. Its totient is φ = 131601132.

The previous prime is 131631509. The next prime is 131631547. The reversal of 131631541 is 145136131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131631541 - 2⁵ = 131631509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131631547) 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, 7365 + ... + 17818.

It is an arithmetic number, because the mean of its divisors is an integer number (32915488).

Almost surely, 2^131631541 is an apocalyptic number.

It is an amenable number.

131631541 is a deficient number, since it is larger than the sum of its proper divisors (30411).

131631541 is an equidigital number, since it uses as much as digits as its factorization.

131631541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30410.

The product of its digits is 1080, while the sum is 25.

The square root of 131631541 is about 11473.0789677401. The cubic root of 131631541 is about 508.6901424907.

Adding to 131631541 its reverse (145136131), we get a palindrome (276767672).

The spelling of 131631541 in words is "one hundred thirty-one million, six hundred thirty-one thousand, five hundred forty-one".