45217255 has 4 divisors (see below), whose sum is σ = 54260712. Its totient is φ = 36173800.

The previous prime is 45217253. The next prime is 45217259. The reversal of 45217255 is 55271254.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 45217255 - 2¹ = 45217253 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 a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45217253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4521721 + ... + 4521730.

It is an arithmetic number, because the mean of its divisors is an integer number (13565178).

Almost surely, 2^45217255 is an apocalyptic number.

45217255 is a deficient number, since it is larger than the sum of its proper divisors (9043457).

45217255 is an equidigital number, since it uses as much as digits as its factorization.

45217255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043456.

The product of its digits is 14000, while the sum is 31.

The square root of 45217255 is about 6724.3776663718. The cubic root of 45217255 is about 356.2608212574.

The spelling of 45217255 in words is "forty-five million, two hundred seventeen thousand, two hundred fifty-five".