54115513 has 2 divisors, whose sum is σ = 54115514. Its totient is φ = 54115512.

The previous prime is 54115507. The next prime is 54115517. The reversal of 54115513 is 31551145.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36036009 + 18079504 = 6003^2 + 4252^2 .

It is a cyclic number.

It is not a de Polignac number, because 54115513 - 2²¹ = 52018361 is a prime.

It is not a weakly prime, because it can be changed into another prime (54115517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27057756 + 27057757.

It is an arithmetic number, because the mean of its divisors is an integer number (27057757).

Almost surely, 2^54115513 is an apocalyptic number.

It is an amenable number.

54115513 is a deficient number, since it is larger than the sum of its proper divisors (1).

54115513 is an equidigital number, since it uses as much as digits as its factorization.

54115513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500, while the sum is 25.

The square root of 54115513 is about 7356.3246937584. The cubic root of 54115513 is about 378.2456364667.

Adding to 54115513 its reverse (31551145), we get a palindrome (85666658).

The spelling of 54115513 in words is "fifty-four million, one hundred fifteen thousand, five hundred thirteen".