131051304521 has 8 divisors (see below), whose sum is σ = 134324860488. Its totient is φ = 127781424000.

The previous prime is 131051304497. The next prime is 131051304523. The reversal of 131051304521 is 125403150131.

It can be written as a sum of positive squares in 4 ways, for example, as 33685463296 + 97365841225 = 183536^2 + 312035^2 .

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-131051304521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131051304523) 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, 846590 + ... + 989351.

It is an arithmetic number, because the mean of its divisors is an integer number (16790607561).

Almost surely, 2^131051304521 is an apocalyptic number.

It is an amenable number.

131051304521 is a deficient number, since it is larger than the sum of its proper divisors (3273555967).

131051304521 is a wasteful number, since it uses less digits than its factorization.

131051304521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837723.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 131051304521 its reverse (125403150131), we get a palindrome (256454454652).

The spelling of 131051304521 in words is "one hundred thirty-one billion, fifty-one million, three hundred four thousand, five hundred twenty-one".