442156223 has 2 divisors, whose sum is σ = 442156224. Its totient is φ = 442156222.

The previous prime is 442156219. The next prime is 442156291. The reversal of 442156223 is 322651244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442156223 - 2² = 442156219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442155223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221078111 + 221078112.

It is an arithmetic number, because the mean of its divisors is an integer number (221078112).

Almost surely, 2^442156223 is an apocalyptic number.

442156223 is a deficient number, since it is larger than the sum of its proper divisors (1).

442156223 is an equidigital number, since it uses as much as digits as its factorization.

442156223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 29.

The square root of 442156223 is about 21027.5110985585. The cubic root of 442156223 is about 761.8308944510.

The spelling of 442156223 in words is "four hundred forty-two million, one hundred fifty-six thousand, two hundred twenty-three".