45559821 has 4 divisors (see below), whose sum is σ = 60746432. Its totient is φ = 30373212.

The previous prime is 45559817. The next prime is 45559823. The reversal of 45559821 is 12895554.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45559821 - 2² = 45559817 is a prime.

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 45559821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45559823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7593301 + ... + 7593306.

It is an arithmetic number, because the mean of its divisors is an integer number (15186608).

Almost surely, 2^45559821 is an apocalyptic number.

It is an amenable number.

45559821 is a deficient number, since it is larger than the sum of its proper divisors (15186611).

45559821 is a wasteful number, since it uses less digits than its factorization.

45559821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15186610.

The product of its digits is 72000, while the sum is 39.

The square root of 45559821 is about 6749.8015526384. The cubic root of 45559821 is about 357.1582363130.

The spelling of 45559821 in words is "forty-five million, five hundred fifty-nine thousand, eight hundred twenty-one".