45105221 has 8 divisors (see below), whose sum is σ = 54262080. Its totient is φ = 36626688.

The previous prime is 45105211. The next prime is 45105239. The reversal of 45105221 is 12250154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45105221 - 2⁶ = 45105157 is a prime.

It is a super-2 number, since 2×45105221² = 4068961922917682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45105193 and 45105202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45105211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169436 + ... + 169701.

It is an arithmetic number, because the mean of its divisors is an integer number (6782760).

Almost surely, 2^45105221 is an apocalyptic number.

It is an amenable number.

45105221 is a deficient number, since it is larger than the sum of its proper divisors (9156859).

45105221 is a wasteful number, since it uses less digits than its factorization.

45105221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339163.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 45105221 is about 6716.0420635967. The cubic root of 45105221 is about 355.9663441861.

Adding to 45105221 its reverse (12250154), we get a palindrome (57355375).

The spelling of 45105221 in words is "forty-five million, one hundred five thousand, two hundred twenty-one".