131313021 has 8 divisors (see below), whose sum is σ = 200096064. Its totient is φ = 75036000.

The previous prime is 131313001. The next prime is 131313031. The reversal of 131313021 is 120313131.

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

It is not a de Polignac number, because 131313021 - 2⁵ = 131312989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131313001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3126480 + ... + 3126521.

It is an arithmetic number, because the mean of its divisors is an integer number (25012008).

Almost surely, 2^131313021 is an apocalyptic number.

It is an amenable number.

131313021 is a deficient number, since it is larger than the sum of its proper divisors (68783043).

131313021 is an equidigital number, since it uses as much as digits as its factorization.

131313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253011.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131313021 is about 11459.1893692355. The cubic root of 131313021 is about 508.2795042048.

Adding to 131313021 its reverse (120313131), we get a palindrome (251626152).

The spelling of 131313021 in words is "one hundred thirty-one million, three hundred thirteen thousand, twenty-one".