45221623 has 4 divisors (see below), whose sum is σ = 45296008. Its totient is φ = 45147240.

The previous prime is 45221621. The next prime is 45221629. The reversal of 45221623 is 32612254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32612254 = 2 ⋅16306127.

It is a cyclic number.

It is not a de Polignac number, because 45221623 - 2¹ = 45221621 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 (45221621) 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, 36273 + ... + 37498.

It is an arithmetic number, because the mean of its divisors is an integer number (11324002).

Almost surely, 2^45221623 is an apocalyptic number.

45221623 is a deficient number, since it is larger than the sum of its proper divisors (74385).

45221623 is an equidigital number, since it uses as much as digits as its factorization.

45221623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74384.

The product of its digits is 2880, while the sum is 25.

The square root of 45221623 is about 6724.7024469489. The cubic root of 45221623 is about 356.2722925211.

Adding to 45221623 its reverse (32612254), we get a palindrome (77833877).

The spelling of 45221623 in words is "forty-five million, two hundred twenty-one thousand, six hundred twenty-three".