45228421 has 6 divisors (see below), whose sum is σ = 52612710. Its totient is φ = 38767176.

The previous prime is 45228413. The next prime is 45228437. The reversal of 45228421 is 12482254.

It can be written as a sum of positive squares in only one way, i.e., 31203396 + 14025025 = 5586^2 + 3745^2 .

It is not a de Polignac number, because 45228421 - 2³ = 45228413 is a prime.

It is a super-2 number, since 2×45228421² = 4091220132306482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45228421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45228401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 461466 + ... + 461563.

It is an arithmetic number, because the mean of its divisors is an integer number (8768785).

Almost surely, 2^45228421 is an apocalyptic number.

It is an amenable number.

45228421 is a deficient number, since it is larger than the sum of its proper divisors (7384289).

45228421 is an equidigital number, since it uses as much as digits as its factorization.

45228421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923043 (or 923036 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 45228421 is about 6725.2078778280. The cubic root of 45228421 is about 356.2901439937.

The spelling of 45228421 in words is "forty-five million, two hundred twenty-eight thousand, four hundred twenty-one".