45206221 has 2 divisors, whose sum is σ = 45206222. Its totient is φ = 45206220.

The previous prime is 45206209. The next prime is 45206269. The reversal of 45206221 is 12260254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26152996 + 19053225 = 5114^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 45206221 - 2⁷ = 45206093 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45206192 and 45206201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45206321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22603110 + 22603111.

It is an arithmetic number, because the mean of its divisors is an integer number (22603111).

Almost surely, 2^45206221 is an apocalyptic number.

It is an amenable number.

45206221 is a deficient number, since it is larger than the sum of its proper divisors (1).

45206221 is an equidigital number, since it uses as much as digits as its factorization.

45206221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 45206221 is about 6723.5571686422. The cubic root of 45206221 is about 356.2318404204.

Adding to 45206221 its reverse (12260254), we get a palindrome (57466475).

The spelling of 45206221 in words is "forty-five million, two hundred six thousand, two hundred twenty-one".