445221001231 has 2 divisors, whose sum is σ = 445221001232. Its totient is φ = 445221001230.

The previous prime is 445221001223. The next prime is 445221001241. The reversal of 445221001231 is 132100122544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445221001231 - 2³ = 445221001223 is a prime.

It is a super-2 number, since 2×445221001231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445221001196 and 445221001205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445221001201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222610500615 + 222610500616.

It is an arithmetic number, because the mean of its divisors is an integer number (222610500616).

Almost surely, 2^445221001231 is an apocalyptic number.

445221001231 is a deficient number, since it is larger than the sum of its proper divisors (1).

445221001231 is an equidigital number, since it uses as much as digits as its factorization.

445221001231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 445221001231 its reverse (132100122544), we get a palindrome (577321123775).

The spelling of 445221001231 in words is "four hundred forty-five billion, two hundred twenty-one million, one thousand, two hundred thirty-one".