45221515 has 4 divisors (see below), whose sum is σ = 54265824. Its totient is φ = 36177208.

The previous prime is 45221507. The next prime is 45221531. The reversal of 45221515 is 51512254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51512254 = 2 ⋅25756127.

It is a cyclic number.

It is not a de Polignac number, because 45221515 - 2³ = 45221507 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 45221515.

It is an unprimeable number.

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, 4522147 + ... + 4522156.

It is an arithmetic number, because the mean of its divisors is an integer number (13566456).

Almost surely, 2^45221515 is an apocalyptic number.

45221515 is a deficient number, since it is larger than the sum of its proper divisors (9044309).

45221515 is an equidigital number, since it uses as much as digits as its factorization.

45221515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9044308.

The product of its digits is 2000, while the sum is 25.

The square root of 45221515 is about 6724.6944168490. The cubic root of 45221515 is about 356.2720088998.

Adding to 45221515 its reverse (51512254), we get a palindrome (96733769).

The spelling of 45221515 in words is "forty-five million, two hundred twenty-one thousand, five hundred fifteen".