54122513 has 4 divisors (see below), whose sum is σ = 54165540. Its totient is φ = 54079488.

The previous prime is 54122491. The next prime is 54122539. The reversal of 54122513 is 31522145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31522145 = 5 ⋅6304429.

It can be written as a sum of positive squares in 2 ways, for example, as 31730689 + 22391824 = 5633^2 + 4732^2 .

It is a cyclic number.

It is not a de Polignac number, because 54122513 - 2¹² = 54118417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54122573) 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, 19568 + ... + 22161.

It is an arithmetic number, because the mean of its divisors is an integer number (13541385).

Almost surely, 2^54122513 is an apocalyptic number.

It is an amenable number.

54122513 is a deficient number, since it is larger than the sum of its proper divisors (43027).

54122513 is a wasteful number, since it uses less digits than its factorization.

54122513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43026.

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

The square root of 54122513 is about 7356.8004594389. The cubic root of 54122513 is about 378.2619448236.

Adding to 54122513 its reverse (31522145), we get a palindrome (85644658).

The spelling of 54122513 in words is "fifty-four million, one hundred twenty-two thousand, five hundred thirteen".