45105215 has 4 divisors (see below), whose sum is σ = 54126264. Its totient is φ = 36084168.

The previous prime is 45105211. The next prime is 45105239. The reversal of 45105215 is 51250154.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 45105215 - 2² = 45105211 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4510517 + ... + 4510526.

It is an arithmetic number, because the mean of its divisors is an integer number (13531566).

Almost surely, 2^45105215 is an apocalyptic number.

45105215 is a deficient number, since it is larger than the sum of its proper divisors (9021049).

45105215 is an equidigital number, since it uses as much as digits as its factorization.

45105215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9021048.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 45105215 is about 6716.0416169050. The cubic root of 45105215 is about 355.9663284023.

Adding to 45105215 its reverse (51250154), we get a palindrome (96355369).

The spelling of 45105215 in words is "forty-five million, one hundred five thousand, two hundred fifteen".