55817471 has 2 divisors, whose sum is σ = 55817472. Its totient is φ = 55817470.

The previous prime is 55817467. The next prime is 55817473. The reversal of 55817471 is 17471855.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55817471 - 2² = 55817467 is a prime.

It is a super-3 number, since 3×55817471³ (a number of 24 digits) contains 333 as substring.

Together with 55817473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55817473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27908735 + 27908736.

It is an arithmetic number, because the mean of its divisors is an integer number (27908736).

Almost surely, 2^55817471 is an apocalyptic number.

55817471 is a deficient number, since it is larger than the sum of its proper divisors (1).

55817471 is an equidigital number, since it uses as much as digits as its factorization.

55817471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39200, while the sum is 38.

The square root of 55817471 is about 7471.1090876790. The cubic root of 55817471 is about 382.1701109994.

The spelling of 55817471 in words is "fifty-five million, eight hundred seventeen thousand, four hundred seventy-one".