45658821 has 24 divisors (see below), whose sum is σ = 69661984. Its totient is φ = 26438400.

The previous prime is 45658817. The next prime is 45658831. The reversal of 45658821 is 12885654.

45658821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45658821 - 2² = 45658817 is a prime.

It is a super-2 number, since 2×45658821² = 4169455870220082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 45658821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45658801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9246 + ... + 13296.

Almost surely, 2^45658821 is an apocalyptic number.

It is an amenable number.

45658821 is a deficient number, since it is larger than the sum of its proper divisors (24003163).

45658821 is a wasteful number, since it uses less digits than its factorization.

45658821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101 (or 4084 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 45658821 is about 6757.1311220073. The cubic root of 45658821 is about 357.4167468779.

The spelling of 45658821 in words is "forty-five million, six hundred fifty-eight thousand, eight hundred twenty-one".