131015081 has 4 divisors (see below), whose sum is σ = 131038464. Its totient is φ = 130991700.

The previous prime is 131015063. The next prime is 131015111. The reversal of 131015081 is 180510131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131015081 - 2¹⁰ = 131014057 is a prime.

It is a super-2 number, since 2×131015081² = 34329902898873122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131015041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276 + ... + 16346.

It is an arithmetic number, because the mean of its divisors is an integer number (32759616).

Almost surely, 2^131015081 is an apocalyptic number.

It is an amenable number.

131015081 is a deficient number, since it is larger than the sum of its proper divisors (23383).

131015081 is an equidigital number, since it uses as much as digits as its factorization.

131015081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23382.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 131015081 is about 11446.1819398435. The cubic root of 131015081 is about 507.8947962958.

The spelling of 131015081 in words is "one hundred thirty-one million, fifteen thousand, eighty-one".