131002071 has 4 divisors (see below), whose sum is σ = 174669432. Its totient is φ = 87334712.

The previous prime is 131002033. The next prime is 131002073. The reversal of 131002071 is 170200131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170200131 = 3 ⋅56733377.

It is a cyclic number.

It is not a de Polignac number, because 131002071 - 2⁷ = 131001943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131002071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131002073) 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, 21833676 + ... + 21833681.

It is an arithmetic number, because the mean of its divisors is an integer number (43667358).

Almost surely, 2^131002071 is an apocalyptic number.

131002071 is a deficient number, since it is larger than the sum of its proper divisors (43667361).

131002071 is an equidigital number, since it uses as much as digits as its factorization.

131002071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43667360.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 131002071 is about 11445.6136139571. The cubic root of 131002071 is about 507.8779841599.

The spelling of 131002071 in words is "one hundred thirty-one million, two thousand, seventy-one".