45452221 has 2 divisors, whose sum is σ = 45452222. Its totient is φ = 45452220.

The previous prime is 45452219. The next prime is 45452257. The reversal of 45452221 is 12225454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31472100 + 13980121 = 5610^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 45452221 - 2¹ = 45452219 is a prime.

Together with 45452219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45452291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22726110 + 22726111.

It is an arithmetic number, because the mean of its divisors is an integer number (22726111).

Almost surely, 2^45452221 is an apocalyptic number.

It is an amenable number.

45452221 is a deficient number, since it is larger than the sum of its proper divisors (1).

45452221 is an equidigital number, since it uses as much as digits as its factorization.

45452221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 25.

The square root of 45452221 is about 6741.8262362657. The cubic root of 45452221 is about 356.8768442217.

Adding to 45452221 its reverse (12225454), we get a palindrome (57677675).

It can be divided in two parts, 4 and 5452221, that added together give a square (5452225 = 2335²).

The spelling of 45452221 in words is "forty-five million, four hundred fifty-two thousand, two hundred twenty-one".