55136843 has 2 divisors, whose sum is σ = 55136844. Its totient is φ = 55136842.

The previous prime is 55136813. The next prime is 55136867. The reversal of 55136843 is 34863155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55136843 - 2¹⁰ = 55135819 is a prime.

It is not a weakly prime, because it can be changed into another prime (55136813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27568421 + 27568422.

It is an arithmetic number, because the mean of its divisors is an integer number (27568422).

Almost surely, 2^55136843 is an apocalyptic number.

55136843 is a deficient number, since it is larger than the sum of its proper divisors (1).

55136843 is an equidigital number, since it uses as much as digits as its factorization.

55136843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 55136843 is about 7425.4187087329. The cubic root of 55136843 is about 380.6103832995.

Adding to 55136843 its reverse (34863155), we get a palindrome (89999998).

The spelling of 55136843 in words is "fifty-five million, one hundred thirty-six thousand, eight hundred forty-three".