45215545 has 4 divisors (see below), whose sum is σ = 54258660. Its totient is φ = 36172432.

The previous prime is 45215531. The next prime is 45215549. The reversal of 45215545 is 54551254.

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 18455616 + 26759929 = 4296^2 + 5173^2 .

It is a cyclic number.

It is not a de Polignac number, because 45215545 - 2¹³ = 45207353 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (45215549) 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, 4521550 + ... + 4521559.

It is an arithmetic number, because the mean of its divisors is an integer number (13564665).

Almost surely, 2^45215545 is an apocalyptic number.

It is an amenable number.

45215545 is a deficient number, since it is larger than the sum of its proper divisors (9043115).

45215545 is an equidigital number, since it uses as much as digits as its factorization.

45215545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043114.

The product of its digits is 20000, while the sum is 31.

The square root of 45215545 is about 6724.2505158568. The cubic root of 45215545 is about 356.2563302456.

Adding to 45215545 its reverse (54551254), we get a palindrome (99766799).

The spelling of 45215545 in words is "forty-five million, two hundred fifteen thousand, five hundred forty-five".