231420071 has 2 divisors, whose sum is σ = 231420072. Its totient is φ = 231420070.

The previous prime is 231420061. The next prime is 231420073. The reversal of 231420071 is 170024132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231420071 - 2¹⁴ = 231403687 is a prime.

It is a Sophie Germain prime.

Together with 231420073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231420073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115710035 + 115710036.

It is an arithmetic number, because the mean of its divisors is an integer number (115710036).

Almost surely, 2^231420071 is an apocalyptic number.

231420071 is a deficient number, since it is larger than the sum of its proper divisors (1).

231420071 is an equidigital number, since it uses as much as digits as its factorization.

231420071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 231420071 is about 15212.4971980277. The cubic root of 231420071 is about 613.9509478156.

The spelling of 231420071 in words is "two hundred thirty-one million, four hundred twenty thousand, seventy-one".