131303861 has 8 divisors (see below), whose sum is σ = 145226424. Its totient is φ = 117927360.

The previous prime is 131303827. The next prime is 131303899. The reversal of 131303861 is 168303131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36844900 + 94458961 = 6070^2 + 9719^2 .

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 131303861 - 2⁶ = 131303797 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 131303861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131305861) 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, 136010 + ... + 136971.

It is an arithmetic number, because the mean of its divisors is an integer number (18153303).

Almost surely, 2^131303861 is an apocalyptic number.

It is an amenable number.

131303861 is a deficient number, since it is larger than the sum of its proper divisors (13922563).

131303861 is a wasteful number, since it uses less digits than its factorization.

131303861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273031.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 131303861 is about 11458.7896830337. The cubic root of 131303861 is about 508.2676852486.

Adding to 131303861 its reverse (168303131), we get a palindrome (299606992).

The spelling of 131303861 in words is "one hundred thirty-one million, three hundred three thousand, eight hundred sixty-one".