320142131 has 2 divisors, whose sum is σ = 320142132. Its totient is φ = 320142130.

The previous prime is 320142127. The next prime is 320142149. The reversal of 320142131 is 131241023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320142131 - 2² = 320142127 is a prime.

It is a super-2 number, since 2×320142131² = 204981968082442322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320142161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160071065 + 160071066.

It is an arithmetic number, because the mean of its divisors is an integer number (160071066).

Almost surely, 2^320142131 is an apocalyptic number.

320142131 is a deficient number, since it is larger than the sum of its proper divisors (1).

320142131 is an equidigital number, since it uses as much as digits as its factorization.

320142131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 320142131 is about 17892.5160611916. The cubic root of 320142131 is about 684.0916305945.

Adding to 320142131 its reverse (131241023), we get a palindrome (451383154).

The spelling of 320142131 in words is "three hundred twenty million, one hundred forty-two thousand, one hundred thirty-one".