55210513 has 2 divisors, whose sum is σ = 55210514. Its totient is φ = 55210512.

The previous prime is 55210487. The next prime is 55210517. The reversal of 55210513 is 31501255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53406864 + 1803649 = 7308^2 + 1343^2 .

It is a cyclic number.

It is not a de Polignac number, because 55210513 - 2⁵ = 55210481 is a prime.

It is not a weakly prime, because it can be changed into another prime (55210517) 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, 27605256 + 27605257.

It is an arithmetic number, because the mean of its divisors is an integer number (27605257).

Almost surely, 2^55210513 is an apocalyptic number.

It is an amenable number.

55210513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55210513 is an equidigital number, since it uses as much as digits as its factorization.

55210513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55210513 is about 7430.3777158365. The cubic root of 55210513 is about 380.7798228642.

Adding to 55210513 its reverse (31501255), we get a palindrome (86711768).

The spelling of 55210513 in words is "fifty-five million, two hundred ten thousand, five hundred thirteen".