131543705 has 8 divisors (see below), whose sum is σ = 167137992. Its totient is φ = 99044608.

The previous prime is 131543677. The next prime is 131543717. The reversal of 131543705 is 507345131.

It can be written as a sum of positive squares in 4 ways, for example, as 51208336 + 80335369 = 7156^2 + 8963^2 .

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 131543705 - 2⁶ = 131543641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773702 + ... + 773871.

It is an arithmetic number, because the mean of its divisors is an integer number (20892249).

Almost surely, 2^131543705 is an apocalyptic number.

It is an amenable number.

131543705 is a deficient number, since it is larger than the sum of its proper divisors (35594287).

131543705 is a wasteful number, since it uses less digits than its factorization.

131543705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547595.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 131543705 is about 11469.2504114262. The cubic root of 131543705 is about 508.5769698952.

Adding to 131543705 its reverse (507345131), we get a palindrome (638888836).

The spelling of 131543705 in words is "one hundred thirty-one million, five hundred forty-three thousand, seven hundred five".