45520217 has 4 divisors (see below), whose sum is σ = 45545700. Its totient is φ = 45494736.

The previous prime is 45520201. The next prime is 45520231. The reversal of 45520217 is 71202554.

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 10426441 + 35093776 = 3229^2 + 5924^2 .

It is a cyclic number.

It is not a de Polignac number, because 45520217 - 2⁴ = 45520201 is a prime.

It is a super-4 number, since 4×45520217⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45520247) 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, 9842 + ... + 13707.

It is an arithmetic number, because the mean of its divisors is an integer number (11386425).

Almost surely, 2^45520217 is an apocalyptic number.

It is an amenable number.

45520217 is a deficient number, since it is larger than the sum of its proper divisors (25483).

45520217 is a wasteful number, since it uses less digits than its factorization.

45520217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25482.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 45520217 is about 6746.8671989302. The cubic root of 45520217 is about 357.0547167713.

The spelling of 45520217 in words is "forty-five million, five hundred twenty thousand, two hundred seventeen".