45807221 has 4 divisors (see below), whose sum is σ = 47045292. Its totient is φ = 44569152.

The previous prime is 45807173. The next prime is 45807227. The reversal of 45807221 is 12270854.

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 39627025 + 6180196 = 6295^2 + 2486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45807221 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 (45807227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618980 + ... + 619053.

It is an arithmetic number, because the mean of its divisors is an integer number (11761323).

Almost surely, 2^45807221 is an apocalyptic number.

It is an amenable number.

45807221 is a deficient number, since it is larger than the sum of its proper divisors (1238071).

45807221 is a wasteful number, since it uses less digits than its factorization.

45807221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238070.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 45807221 is about 6768.1032054779. The cubic root of 45807221 is about 357.8035526363.

The spelling of 45807221 in words is "forty-five million, eight hundred seven thousand, two hundred twenty-one".