442180813 has 2 divisors, whose sum is σ = 442180814. Its totient is φ = 442180812.

The previous prime is 442180759. The next prime is 442180867. The reversal of 442180813 is 318081244.

It is a balanced prime because it is at equal distance from previous prime (442180759) and next prime (442180867).

It can be written as a sum of positive squares in only one way, i.e., 301473769 + 140707044 = 17363^2 + 11862^2 .

It is a cyclic number.

It is not a de Polignac number, because 442180813 - 2²⁵ = 408626381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442180873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221090406 + 221090407.

It is an arithmetic number, because the mean of its divisors is an integer number (221090407).

Almost surely, 2^442180813 is an apocalyptic number.

It is an amenable number.

442180813 is a deficient number, since it is larger than the sum of its proper divisors (1).

442180813 is an equidigital number, since it uses as much as digits as its factorization.

442180813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 442180813 is about 21028.0958006188. The cubic root of 442180813 is about 761.8450169666.

The spelling of 442180813 in words is "four hundred forty-two million, one hundred eighty thousand, eight hundred thirteen".