131313819 has 16 divisors (see below), whose sum is σ = 215489792. Its totient is φ = 69264288.

The previous prime is 131313811. The next prime is 131313823. The reversal of 131313819 is 918313131.

It is a happy number.

It is not a de Polignac number, because 131313819 - 2³ = 131313811 is a prime.

It is a super-2 number, since 2×131313819² = 34486638120729522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (131313811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240229 + ... + 240774.

It is an arithmetic number, because the mean of its divisors is an integer number (13468112).

Almost surely, 2^131313819 is an apocalyptic number.

131313819 is a deficient number, since it is larger than the sum of its proper divisors (84175973).

131313819 is a wasteful number, since it uses less digits than its factorization.

131313819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481026.

The product of its digits is 1944, while the sum is 30.

The square root of 131313819 is about 11459.2241883995. The cubic root of 131313819 is about 508.2805338215.

The spelling of 131313819 in words is "one hundred thirty-one million, three hundred thirteen thousand, eight hundred nineteen".