55136647 has 2 divisors, whose sum is σ = 55136648. Its totient is φ = 55136646.

The previous prime is 55136639. The next prime is 55136659. The reversal of 55136647 is 74663155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55136647 - 2³ = 55136639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55136947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27568323 + 27568324.

It is an arithmetic number, because the mean of its divisors is an integer number (27568324).

Almost surely, 2^55136647 is an apocalyptic number.

55136647 is a deficient number, since it is larger than the sum of its proper divisors (1).

55136647 is an equidigital number, since it uses as much as digits as its factorization.

55136647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 55136647 is about 7425.4055108122. The cubic root of 55136647 is about 380.6099323020.

The spelling of 55136647 in words is "fifty-five million, one hundred thirty-six thousand, six hundred forty-seven".