131611863 has 8 divisors (see below), whose sum is σ = 179563648. Its totient is φ = 85700664.

The previous prime is 131611861. The next prime is 131611873. The reversal of 131611863 is 368116131.

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

It is not a de Polignac number, because 131611863 - 2¹ = 131611861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131611863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131611861) 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 7 ways as a sum of consecutive naturals, for example, 509995 + ... + 510252.

It is an arithmetic number, because the mean of its divisors is an integer number (22445456).

Almost surely, 2^131611863 is an apocalyptic number.

131611863 is a deficient number, since it is larger than the sum of its proper divisors (47951785).

131611863 is a wasteful number, since it uses less digits than its factorization.

131611863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020293.

The product of its digits is 2592, while the sum is 30.

The square root of 131611863 is about 11472.2213629271. The cubic root of 131611863 is about 508.6647926812.

Adding to 131611863 its reverse (368116131), we get a palindrome (499727994).

The spelling of 131611863 in words is "one hundred thirty-one million, six hundred eleven thousand, eight hundred sixty-three".