45553021 has 2 divisors, whose sum is σ = 45553022. Its totient is φ = 45553020.

The previous prime is 45553019. The next prime is 45553033. The reversal of 45553021 is 12035554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41100921 + 4452100 = 6411^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 45553021 - 2¹ = 45553019 is a prime.

Together with 45553019, 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 (45553721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22776510 + 22776511.

It is an arithmetic number, because the mean of its divisors is an integer number (22776511).

Almost surely, 2^45553021 is an apocalyptic number.

It is an amenable number.

45553021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45553021 is an equidigital number, since it uses as much as digits as its factorization.

45553021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 45553021 is about 6749.2978153286. The cubic root of 45553021 is about 357.1404662926.

Adding to 45553021 its reverse (12035554), we get a palindrome (57588575).

The spelling of 45553021 in words is "forty-five million, five hundred fifty-three thousand, twenty-one".