45281515 has 4 divisors (see below), whose sum is σ = 54337824. Its totient is φ = 36225208.

The previous prime is 45281513. The next prime is 45281519. The reversal of 45281515 is 51518254.

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 45281515 - 2¹ = 45281513 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45281513) 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, 4528147 + ... + 4528156.

It is an arithmetic number, because the mean of its divisors is an integer number (13584456).

Almost surely, 2^45281515 is an apocalyptic number.

45281515 is a deficient number, since it is larger than the sum of its proper divisors (9056309).

45281515 is an equidigital number, since it uses as much as digits as its factorization.

45281515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9056308.

The product of its digits is 8000, while the sum is 31.

The square root of 45281515 is about 6729.1541073154. The cubic root of 45281515 is about 356.4295067446.

Adding to 45281515 its reverse (51518254), we get a palindrome (96799769).

It can be divided in two parts, 45281 and 515, that added together give a square (45796 = 214²).

The spelling of 45281515 in words is "forty-five million, two hundred eighty-one thousand, five hundred fifteen".