54243513 has 10 divisors (see below), whose sum is σ = 81030554. Its totient is φ = 36162288.

The previous prime is 54243493. The next prime is 54243529. The reversal of 54243513 is 31534245.

It can be written as a sum of positive squares in only one way, i.e., 36578304 + 17665209 = 6048^2 + 4203^2 .

It is not a de Polignac number, because 54243513 - 2⁸ = 54243257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54243313) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 334756 + ... + 334917.

Almost surely, 2^54243513 is an apocalyptic number.

It is an amenable number.

54243513 is a deficient number, since it is larger than the sum of its proper divisors (26787041).

54243513 is an equidigital number, since it uses as much as digits as its factorization.

54243513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669685 (or 669676 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 54243513 is about 7365.0195519089. The cubic root of 54243513 is about 378.5436244578.

Adding to 54243513 its reverse (31534245), we get a palindrome (85777758).

It can be divided in two parts, 54243 and 513, that added together give a square (54756 = 234²).

The spelling of 54243513 in words is "fifty-four million, two hundred forty-three thousand, five hundred thirteen".