131334403521 has 4 divisors (see below), whose sum is σ = 175112538032. Its totient is φ = 87556269012.

The previous prime is 131334403507. The next prime is 131334403537. The reversal of 131334403521 is 125304433131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131334403521 - 2¹⁰ = 131334402497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131334403721) 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 3 ways as a sum of consecutive naturals, for example, 21889067251 + ... + 21889067256.

It is an arithmetic number, because the mean of its divisors is an integer number (43778134508).

Almost surely, 2^131334403521 is an apocalyptic number.

It is an amenable number.

131334403521 is a deficient number, since it is larger than the sum of its proper divisors (43778134511).

131334403521 is an equidigital number, since it uses as much as digits as its factorization.

131334403521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43778134510.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 131334403521 its reverse (125304433131), we get a palindrome (256638836652).

The spelling of 131334403521 in words is "one hundred thirty-one billion, three hundred thirty-four million, four hundred three thousand, five hundred twenty-one".