45220257 has 6 divisors (see below), whose sum is σ = 65318162. Its totient is φ = 30146832.

The previous prime is 45220249. The next prime is 45220271. The reversal of 45220257 is 75202254.

45220257 is a `hidden beast` number, since 452 + 202 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39050001 + 6170256 = 6249^2 + 2484^2 .

It is not a de Polignac number, because 45220257 - 2³ = 45220249 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 45220257.

It is not an unprimeable number, because it can be changed into a prime (45220237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2512228 + ... + 2512245.

Almost surely, 2^45220257 is an apocalyptic number.

It is an amenable number.

45220257 is a deficient number, since it is larger than the sum of its proper divisors (20097905).

45220257 is a wasteful number, since it uses less digits than its factorization.

45220257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024479 (or 5024476 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 45220257 is about 6724.6008803497. The cubic root of 45220257 is about 356.2687052044.

The spelling of 45220257 in words is "forty-five million, two hundred twenty thousand, two hundred fifty-seven".