45182821 has 8 divisors (see below), whose sum is σ = 47902104. Its totient is φ = 42470400.

The previous prime is 45182807. The next prime is 45182827. The reversal of 45182821 is 12828154.

It can be written as a sum of positive squares in 4 ways, for example, as 11088900 + 34093921 = 3330^2 + 5839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45182821 - 2¹³ = 45174629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45182827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19311 + ... + 21523.

It is an arithmetic number, because the mean of its divisors is an integer number (5987763).

Almost surely, 2^45182821 is an apocalyptic number.

It is an amenable number.

45182821 is a deficient number, since it is larger than the sum of its proper divisors (2719283).

45182821 is a wasteful number, since it uses less digits than its factorization.

45182821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431.

The product of its digits is 5120, while the sum is 31.

The square root of 45182821 is about 6721.8167930999. The cubic root of 45182821 is about 356.1703646354.

The spelling of 45182821 in words is "forty-five million, one hundred eighty-two thousand, eight hundred twenty-one".