55345331 has 2 divisors, whose sum is σ = 55345332. Its totient is φ = 55345330.

The previous prime is 55345289. The next prime is 55345351. The reversal of 55345331 is 13354355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55345331 - 2¹⁰ = 55344307 is a prime.

It is a super-2 number, since 2×55345331² = 6126211326999122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55345294 and 55345303.

It is not a weakly prime, because it can be changed into another prime (55345351) 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, 27672665 + 27672666.

It is an arithmetic number, because the mean of its divisors is an integer number (27672666).

Almost surely, 2^55345331 is an apocalyptic number.

55345331 is a deficient number, since it is larger than the sum of its proper divisors (1).

55345331 is an equidigital number, since it uses as much as digits as its factorization.

55345331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 29.

The square root of 55345331 is about 7439.4442668791. Note that the first 3 decimals coincide. The cubic root of 55345331 is about 381.0895117402.

Adding to 55345331 its reverse (13354355), we get a palindrome (68699686).

The spelling of 55345331 in words is "fifty-five million, three hundred forty-five thousand, three hundred thirty-one".