131555555 has 8 divisors (see below), whose sum is σ = 158685792. Its totient is φ = 104698368.

The previous prime is 131555549. The next prime is 131555597. The reversal of 131555555 is 555555131.

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 131555555 - 2¹⁴ = 131539171 is a prime.

It is a Duffinian number.

131555555 is a modest number, since divided by 55555 gives 1315 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67199 + ... + 69128.

It is an arithmetic number, because the mean of its divisors is an integer number (19835724).

Almost surely, 2^131555555 is an apocalyptic number.

131555555 is a deficient number, since it is larger than the sum of its proper divisors (27130237).

131555555 is a wasteful number, since it uses less digits than its factorization.

131555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136525.

The product of its digits is 46875, while the sum is 35.

The square root of 131555555 is about 11469.7669985052. The cubic root of 131555555 is about 508.5922410076.

The spelling of 131555555 in words is "one hundred thirty-one million, five hundred fifty-five thousand, five hundred fifty-five".