445321513213 has 2 divisors, whose sum is σ = 445321513214. Its totient is φ = 445321513212.

The previous prime is 445321513199. The next prime is 445321513237. The reversal of 445321513213 is 312315123544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401077756249 + 44243756964 = 633307^2 + 210342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445321513213 is a prime.

It is a super-2 number, since 2×445321513213² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445321513283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222660756606 + 222660756607.

It is an arithmetic number, because the mean of its divisors is an integer number (222660756607).

Almost surely, 2^445321513213 is an apocalyptic number.

It is an amenable number.

445321513213 is a deficient number, since it is larger than the sum of its proper divisors (1).

445321513213 is an equidigital number, since it uses as much as digits as its factorization.

445321513213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 34.

Adding to 445321513213 its reverse (312315123544), we get a palindrome (757636636757).

The spelling of 445321513213 in words is "four hundred forty-five billion, three hundred twenty-one million, five hundred thirteen thousand, two hundred thirteen".