55331513 has 2 divisors, whose sum is σ = 55331514. Its totient is φ = 55331512.

The previous prime is 55331503. The next prime is 55331527. The reversal of 55331513 is 31513355.

55331513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34199104 + 21132409 = 5848^2 + 4597^2 .

It is a cyclic number.

It is not a de Polignac number, because 55331513 - 2¹² = 55327417 is a prime.

It is not a weakly prime, because it can be changed into another prime (55331503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665756 + 27665757.

It is an arithmetic number, because the mean of its divisors is an integer number (27665757).

Almost surely, 2^55331513 is an apocalyptic number.

It is an amenable number.

55331513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55331513 is an equidigital number, since it uses as much as digits as its factorization.

55331513 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 55331513 is about 7438.5155105034. The cubic root of 55331513 is about 381.0577937188.

Adding to 55331513 its reverse (31513355), we get a palindrome (86844868).

The spelling of 55331513 in words is "fifty-five million, three hundred thirty-one thousand, five hundred thirteen".