131106815 has 16 divisors (see below), whose sum is σ = 180499968. Its totient is φ = 89553696.

The previous prime is 131106809. The next prime is 131106841. The reversal of 131106815 is 518601131.

It is a cyclic number.

It is not a de Polignac number, because 131106815 - 2⁸ = 131106559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084 + ... + 16326.

It is an arithmetic number, because the mean of its divisors is an integer number (11281248).

Almost surely, 2^131106815 is an apocalyptic number.

131106815 is a deficient number, since it is larger than the sum of its proper divisors (49393153).

131106815 is a wasteful number, since it uses less digits than its factorization.

131106815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14518.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 131106815 is about 11450.1884263972. The cubic root of 131106815 is about 508.0133077197.

Adding to 131106815 its reverse (518601131), we get a palindrome (649707946).

The spelling of 131106815 in words is "one hundred thirty-one million, one hundred six thousand, eight hundred fifteen".