442471231 has 2 divisors, whose sum is σ = 442471232. Its totient is φ = 442471230.

The previous prime is 442471193. The next prime is 442471261. The reversal of 442471231 is 132174244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442471231 - 2⁷ = 442471103 is a prime.

It is a super-2 number, since 2×442471231² = 391561580525310722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442471231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442471261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221235615 + 221235616.

It is an arithmetic number, because the mean of its divisors is an integer number (221235616).

Almost surely, 2^442471231 is an apocalyptic number.

442471231 is a deficient number, since it is larger than the sum of its proper divisors (1).

442471231 is an equidigital number, since it uses as much as digits as its factorization.

442471231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 442471231 is about 21035.0001426194. Note that the first 3 decimals coincide. The cubic root of 442471231 is about 762.0117700825.

The spelling of 442471231 in words is "four hundred forty-two million, four hundred seventy-one thousand, two hundred thirty-one".