45556321 has 4 divisors (see below), whose sum is σ = 45631252. Its totient is φ = 45481392.

The previous prime is 45556283. The next prime is 45556327. The reversal of 45556321 is 12365554.

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 8346321 + 37210000 = 2889^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 45556321 - 2⁷ = 45556193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45556327) 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, 36546 + ... + 37771.

It is an arithmetic number, because the mean of its divisors is an integer number (11407813).

Almost surely, 2^45556321 is an apocalyptic number.

It is an amenable number.

45556321 is a deficient number, since it is larger than the sum of its proper divisors (74931).

45556321 is an equidigital number, since it uses as much as digits as its factorization.

45556321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74930.

The product of its digits is 18000, while the sum is 31.

The square root of 45556321 is about 6749.5422807773. The cubic root of 45556321 is about 357.1490901998.

The spelling of 45556321 in words is "forty-five million, five hundred fifty-six thousand, three hundred twenty-one".