45219647 has 4 divisors (see below), whose sum is σ = 49330536. Its totient is φ = 41108760.

The previous prime is 45219641. The next prime is 45219659. The reversal of 45219647 is 74691254.

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

It is not a de Polignac number, because 45219647 - 2¹⁶ = 45154111 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 45219647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45219641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2055428 + ... + 2055449.

It is an arithmetic number, because the mean of its divisors is an integer number (12332634).

Almost surely, 2^45219647 is an apocalyptic number.

45219647 is a deficient number, since it is larger than the sum of its proper divisors (4110889).

45219647 is a wasteful number, since it uses less digits than its factorization.

45219647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110888.

The product of its digits is 60480, while the sum is 38.

The square root of 45219647 is about 6724.5555243451. Note that the first 4 decimals coincide. The cubic root of 45219647 is about 356.2671032314.

The spelling of 45219647 in words is "forty-five million, two hundred nineteen thousand, six hundred forty-seven".