55136239 has 2 divisors, whose sum is σ = 55136240. Its totient is φ = 55136238.

The previous prime is 55136231. The next prime is 55136251. The reversal of 55136239 is 93263155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55136239 - 2³ = 55136231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55136231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27568119 + 27568120.

It is an arithmetic number, because the mean of its divisors is an integer number (27568120).

Almost surely, 2^55136239 is an apocalyptic number.

55136239 is a deficient number, since it is larger than the sum of its proper divisors (1).

55136239 is an equidigital number, since it uses as much as digits as its factorization.

55136239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 34.

The square root of 55136239 is about 7425.3780375143. The cubic root of 55136239 is about 380.6089934876.

The spelling of 55136239 in words is "fifty-five million, one hundred thirty-six thousand, two hundred thirty-nine".