55186907 has 2 divisors, whose sum is σ = 55186908. Its totient is φ = 55186906.

The previous prime is 55186897. The next prime is 55186921. The reversal of 55186907 is 70968155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55186907 - 2¹² = 55182811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55180907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27593453 + 27593454.

It is an arithmetic number, because the mean of its divisors is an integer number (27593454).

Almost surely, 2^55186907 is an apocalyptic number.

55186907 is a deficient number, since it is larger than the sum of its proper divisors (1).

55186907 is an equidigital number, since it uses as much as digits as its factorization.

55186907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 55186907 is about 7428.7890668668. The cubic root of 55186907 is about 380.7255459436.

The spelling of 55186907 in words is "fifty-five million, one hundred eighty-six thousand, nine hundred seven".