442531237 has 2 divisors, whose sum is σ = 442531238. Its totient is φ = 442531236.

The previous prime is 442531207. The next prime is 442531249. The reversal of 442531237 is 732135244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288796036 + 153735201 = 16994^2 + 12399^2 .

It is a cyclic number.

It is not a de Polignac number, because 442531237 - 2¹⁹ = 442006949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442531199 and 442531208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442531207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221265618 + 221265619.

It is an arithmetic number, because the mean of its divisors is an integer number (221265619).

Almost surely, 2^442531237 is an apocalyptic number.

It is an amenable number.

442531237 is a deficient number, since it is larger than the sum of its proper divisors (1).

442531237 is an equidigital number, since it uses as much as digits as its factorization.

442531237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 442531237 is about 21036.4264313119. The cubic root of 442531237 is about 762.0462154190.

It can be divided in two parts, 44 and 2531237, that added together give a square (2531281 = 1591²).

The spelling of 442531237 in words is "four hundred forty-two million, five hundred thirty-one thousand, two hundred thirty-seven".