445540331 has 2 divisors, whose sum is σ = 445540332. Its totient is φ = 445540330.

The previous prime is 445540327. The next prime is 445540343. The reversal of 445540331 is 133045544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445540331 - 2² = 445540327 is a prime.

It is a super-2 number, since 2×445540331² = 397012373095179122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445540294 and 445540303.

It is not a weakly prime, because it can be changed into another prime (445540351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222770165 + 222770166.

It is an arithmetic number, because the mean of its divisors is an integer number (222770166).

Almost surely, 2^445540331 is an apocalyptic number.

445540331 is a deficient number, since it is larger than the sum of its proper divisors (1).

445540331 is an equidigital number, since it uses as much as digits as its factorization.

445540331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 445540331 is about 21107.8262973713. The cubic root of 445540331 is about 763.7695520115.

Adding to 445540331 its reverse (133045544), we get a palindrome (578585875).

The spelling of 445540331 in words is "four hundred forty-five million, five hundred forty thousand, three hundred thirty-one".