45122513 has 4 divisors (see below), whose sum is σ = 45136308. Its totient is φ = 45108720.

The previous prime is 45122507. The next prime is 45122531. The reversal of 45122513 is 31522154.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 42667024 + 2455489 = 6532^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 45122513 - 2⁶ = 45122449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45122503) 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, 1103 + ... + 9563.

It is an arithmetic number, because the mean of its divisors is an integer number (11284077).

Almost surely, 2^45122513 is an apocalyptic number.

It is an amenable number.

45122513 is a deficient number, since it is larger than the sum of its proper divisors (13795).

45122513 is an equidigital number, since it uses as much as digits as its factorization.

45122513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13794.

The product of its digits is 1200, while the sum is 23.

The square root of 45122513 is about 6717.3293056095. The cubic root of 45122513 is about 356.0118273435.

Adding to 45122513 its reverse (31522154), we get a palindrome (76644667).

The spelling of 45122513 in words is "forty-five million, one hundred twenty-two thousand, five hundred thirteen".