131819506 has 48 divisors (see below), whose sum is σ = 250278336. Its totient is φ = 51607584.

The previous prime is 131819491. The next prime is 131819539. The reversal of 131819506 is 605918131.

Together with 118458830 it forms an amicable pair .

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 23 ways as a sum of consecutive naturals, for example, 135835 + ... + 136801.

It is an arithmetic number, because the mean of its divisors is an integer number (5214132).

Almost surely, 2^131819506 is an apocalyptic number.

131819506 is a deficient number, since it is larger than the sum of its proper divisors (118458830).

131819506 is a wasteful number, since it uses less digits than its factorization.

131819506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 131819506 is about 11481.2676129424. The cubic root of 131819506 is about 508.9321576034.

The spelling of 131819506 in words is "one hundred thirty-one million, eight hundred nineteen thousand, five hundred six".