131000115521 has 8 divisors (see below), whose sum is σ = 142920068544. Its totient is φ = 119081971120.

The previous prime is 131000115517. The next prime is 131000115557. The reversal of 131000115521 is 125511000131.

It is a happy number.

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 131000115521 - 2² = 131000115517 is a prime.

It is a super-2 number, since 2×131000115521² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131000115493 and 131000115502.

It is not an unprimeable number, because it can be changed into a prime (131000115511) 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, 298430 + ... + 592503.

It is an arithmetic number, because the mean of its divisors is an integer number (17865008568).

Almost surely, 2^131000115521 is an apocalyptic number.

131000115521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131000115521 is a deficient number, since it is larger than the sum of its proper divisors (11919953023).

131000115521 is a wasteful number, since it uses less digits than its factorization.

131000115521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904311.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 131000115521 its reverse (125511000131), we get a palindrome (256511115652).

The spelling of 131000115521 in words is "one hundred thirty-one billion, one hundred fifteen thousand, five hundred twenty-one".