55867291 has 2 divisors, whose sum is σ = 55867292. Its totient is φ = 55867290.

The previous prime is 55867289. The next prime is 55867319. The reversal of 55867291 is 19276855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55867291 - 2¹ = 55867289 is a prime.

Together with 55867289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55867271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27933645 + 27933646.

It is an arithmetic number, because the mean of its divisors is an integer number (27933646).

Almost surely, 2^55867291 is an apocalyptic number.

55867291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55867291 is an equidigital number, since it uses as much as digits as its factorization.

55867291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 55867291 is about 7474.4425210179. The cubic root of 55867291 is about 382.2837794306.

The spelling of 55867291 in words is "fifty-five million, eight hundred sixty-seven thousand, two hundred ninety-one".