131851587 has 32 divisors (see below), whose sum is σ = 208359424. Its totient is φ = 72576000.

The previous prime is 131851567. The next prime is 131851589. The reversal of 131851587 is 785158131.

It is a happy number.

It is not a de Polignac number, because 131851587 - 2¹⁴ = 131835203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131851589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219087 + ... + 219687.

It is an arithmetic number, because the mean of its divisors is an integer number (6511232).

Almost surely, 2^131851587 is an apocalyptic number.

131851587 is a deficient number, since it is larger than the sum of its proper divisors (76507837).

131851587 is a wasteful number, since it uses less digits than its factorization.

131851587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979.

The product of its digits is 33600, while the sum is 39.

The square root of 131851587 is about 11482.6646297800. The cubic root of 131851587 is about 508.9734406394.

The spelling of 131851587 in words is "one hundred thirty-one million, eight hundred fifty-one thousand, five hundred eighty-seven".