131521545505 has 32 divisors (see below), whose sum is σ = 186207519744. Its totient is φ = 87293915136.

The previous prime is 131521545473. The next prime is 131521545553. The reversal of 131521545505 is 505545125131.

It is a cyclic number.

It is not a de Polignac number, because 131521545505 - 2⁵ = 131521545473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 13177 + ... + 513046.

It is an arithmetic number, because the mean of its divisors is an integer number (5818984992).

Almost surely, 2^131521545505 is an apocalyptic number.

It is an amenable number.

131521545505 is a deficient number, since it is larger than the sum of its proper divisors (54685974239).

131521545505 is a wasteful number, since it uses less digits than its factorization.

131521545505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526465.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 131521545505 in words is "one hundred thirty-one billion, five hundred twenty-one million, five hundred forty-five thousand, five hundred five".