45022021 has 16 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 39939120.

The previous prime is 45021979. The next prime is 45022037. The reversal of 45022021 is 12022054.

It is a cyclic number.

It is not a de Polignac number, because 45022021 - 2¹¹ = 45019973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45021986 and 45022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45022051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89256 + ... + 89758.

It is an arithmetic number, because the mean of its divisors is an integer number (3144960).

Almost surely, 2^45022021 is an apocalyptic number.

It is an amenable number.

45022021 is a deficient number, since it is larger than the sum of its proper divisors (5297339).

45022021 is a wasteful number, since it uses less digits than its factorization.

45022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 45022021 is about 6709.8450801788. The cubic root of 45022021 is about 355.7473405042.

Adding to 45022021 its reverse (12022054), we get a palindrome (57044075).

It can be divided in two parts, 450220 and 21, that added together give a square (450241 = 671²).

The spelling of 45022021 in words is "forty-five million, twenty-two thousand, twenty-one".