131303221 has 8 divisors (see below), whose sum is σ = 150206400. Its totient is φ = 112436448.

The previous prime is 131303203. The next prime is 131303239. The reversal of 131303221 is 122303131.

It is an interprime number because it is at equal distance from previous prime (131303203) and next prime (131303239).

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 131303221 - 2⁷ = 131303093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131303195 and 131303204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131303201) 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, 871 + ... + 16228.

It is an arithmetic number, because the mean of its divisors is an integer number (18775800).

Almost surely, 2^131303221 is an apocalyptic number.

It is an amenable number.

131303221 is a deficient number, since it is larger than the sum of its proper divisors (18903179).

131303221 is a wasteful number, since it uses less digits than its factorization.

131303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18203.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131303221 is about 11458.7617568392. The cubic root of 131303221 is about 508.2668594495.

Adding to 131303221 its reverse (122303131), we get a palindrome (253606352).

The spelling of 131303221 in words is "one hundred thirty-one million, three hundred three thousand, two hundred twenty-one".