55133513 has 2 divisors, whose sum is σ = 55133514. Its totient is φ = 55133512.

The previous prime is 55133501. The next prime is 55133549. The reversal of 55133513 is 31533155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28590409 + 26543104 = 5347^2 + 5152^2 .

It is a cyclic number.

It is not a de Polignac number, because 55133513 - 2⁸ = 55133257 is a prime.

It is not a weakly prime, because it can be changed into another prime (55133413) 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 as a sum of consecutive naturals, namely, 27566756 + 27566757.

It is an arithmetic number, because the mean of its divisors is an integer number (27566757).

Almost surely, 2^55133513 is an apocalyptic number.

It is an amenable number.

55133513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55133513 is an equidigital number, since it uses as much as digits as its factorization.

55133513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3375, while the sum is 26.

The square root of 55133513 is about 7425.1944755676. The cubic root of 55133513 is about 380.6027208000.

Adding to 55133513 its reverse (31533155), we get a palindrome (86666668).

The spelling of 55133513 in words is "fifty-five million, one hundred thirty-three thousand, five hundred thirteen".