131721053 has 8 divisors (see below), whose sum is σ = 140085120. Its totient is φ = 123500160.

The previous prime is 131721043. The next prime is 131721067. The reversal of 131721053 is 350127131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131721053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131721043) 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, 33893 + ... + 37578.

It is an arithmetic number, because the mean of its divisors is an integer number (17510640).

Almost surely, 2^131721053 is an apocalyptic number.

It is an amenable number.

131721053 is a deficient number, since it is larger than the sum of its proper divisors (8364067).

131721053 is an equidigital number, since it uses as much as digits as its factorization.

131721053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71587.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 131721053 is about 11476.9792628548. The cubic root of 131721053 is about 508.8054227503.

Adding to 131721053 its reverse (350127131), we get a palindrome (481848184).

The spelling of 131721053 in words is "one hundred thirty-one million, seven hundred twenty-one thousand, fifty-three".