131545555 has 8 divisors (see below), whose sum is σ = 162946944. Its totient is φ = 101841600.

The previous prime is 131545549. The next prime is 131545559. The reversal of 131545555 is 555545131.

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

It is a de Polignac number, because none of the positive numbers 2^k-131545555 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131545555.

It is not an unprimeable number, because it can be changed into a prime (131545559) 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, 424186 + ... + 424495.

It is an arithmetic number, because the mean of its divisors is an integer number (20368368).

Almost surely, 2^131545555 is an apocalyptic number.

131545555 is a deficient number, since it is larger than the sum of its proper divisors (31401389).

131545555 is an equidigital number, since it uses as much as digits as its factorization.

131545555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848717.

The product of its digits is 37500, while the sum is 34.

The square root of 131545555 is about 11469.3310615746. The cubic root of 131545555 is about 508.5793540533.

The spelling of 131545555 in words is "one hundred thirty-one million, five hundred forty-five thousand, five hundred fifty-five".