45621805 has 4 divisors (see below), whose sum is σ = 54746172. Its totient is φ = 36497440.

The previous prime is 45621803. The next prime is 45621833. The reversal of 45621805 is 50812654.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35259844 + 10361961 = 5938^2 + 3219^2 .

It is not a de Polignac number, because 45621805 - 2¹ = 45621803 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45621803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4562176 + ... + 4562185.

It is an arithmetic number, because the mean of its divisors is an integer number (13686543).

Almost surely, 2^45621805 is an apocalyptic number.

It is an amenable number.

45621805 is a deficient number, since it is larger than the sum of its proper divisors (9124367).

45621805 is an equidigital number, since it uses as much as digits as its factorization.

45621805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124366.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 45621805 is about 6754.3915344019. The cubic root of 45621805 is about 357.3201338184.

The spelling of 45621805 in words is "forty-five million, six hundred twenty-one thousand, eight hundred five".