45225221 has 2 divisors, whose sum is σ = 45225222. Its totient is φ = 45225220.

The previous prime is 45225197. The next prime is 45225241. The reversal of 45225221 is 12252254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 6300100 = 6239^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 45225221 - 2⁶ = 45225157 is a prime.

It is a super-2 number, since 2×45225221² = 4090641228997682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45225241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22612610 + 22612611.

It is an arithmetic number, because the mean of its divisors is an integer number (22612611).

Almost surely, 2^45225221 is an apocalyptic number.

It is an amenable number.

45225221 is a deficient number, since it is larger than the sum of its proper divisors (1).

45225221 is an equidigital number, since it uses as much as digits as its factorization.

45225221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 23.

The square root of 45225221 is about 6724.9699627582. The cubic root of 45225221 is about 356.2817410520.

Adding to 45225221 its reverse (12252254), we get a palindrome (57477475).

It can be divided in two parts, 4 and 5225221, that added together give a palindrome (5225225).

The spelling of 45225221 in words is "forty-five million, two hundred twenty-five thousand, two hundred twenty-one".