445400213 has 2 divisors, whose sum is σ = 445400214. Its totient is φ = 445400212.

The previous prime is 445400201. The next prime is 445400243. The reversal of 445400213 is 312004544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313219204 + 132181009 = 17698^2 + 11497^2 .

It is a cyclic number.

It is not a de Polignac number, because 445400213 - 2¹² = 445396117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445400243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222700106 + 222700107.

It is an arithmetic number, because the mean of its divisors is an integer number (222700107).

Almost surely, 2^445400213 is an apocalyptic number.

It is an amenable number.

445400213 is a deficient number, since it is larger than the sum of its proper divisors (1).

445400213 is an equidigital number, since it uses as much as digits as its factorization.

445400213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 445400213 is about 21104.5069357235. The cubic root of 445400213 is about 763.6894776424.

Adding to 445400213 its reverse (312004544), we get a palindrome (757404757).

The spelling of 445400213 in words is "four hundred forty-five million, four hundred thousand, two hundred thirteen".