445072213 has 2 divisors, whose sum is σ = 445072214. Its totient is φ = 445072212.

The previous prime is 445072157. The next prime is 445072219. The reversal of 445072213 is 312270544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334780209 + 110292004 = 18297^2 + 10502^2 .

It is a cyclic number.

It is not a de Polignac number, because 445072213 - 2²¹ = 442975061 is a prime.

It is equal to p_23605615 and since 445072213 and 23605615 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445072219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222536106 + 222536107.

It is an arithmetic number, because the mean of its divisors is an integer number (222536107).

Almost surely, 2^445072213 is an apocalyptic number.

It is an amenable number.

445072213 is a deficient number, since it is larger than the sum of its proper divisors (1).

445072213 is an equidigital number, since it uses as much as digits as its factorization.

445072213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 445072213 is about 21096.7346525475. The cubic root of 445072213 is about 763.5019671332.

The spelling of 445072213 in words is "four hundred forty-five million, seventy-two thousand, two hundred thirteen".