55995281 has 2 divisors, whose sum is σ = 55995282. Its totient is φ = 55995280.

The previous prime is 55995257. The next prime is 55995301. The reversal of 55995281 is 18259955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 10297681 = 6760^2 + 3209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55995281 is a prime.

It is a super-2 number, since 2×55995281² = 6270942988537922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55995581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997640 + 27997641.

It is an arithmetic number, because the mean of its divisors is an integer number (27997641).

Almost surely, 2^55995281 is an apocalyptic number.

It is an amenable number.

55995281 is a deficient number, since it is larger than the sum of its proper divisors (1).

55995281 is an equidigital number, since it uses as much as digits as its factorization.

55995281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 44.

The square root of 55995281 is about 7482.9994654550. Note that the first 3 decimals coincide. The cubic root of 55995281 is about 382.5754896785.

The spelling of 55995281 in words is "fifty-five million, nine hundred ninety-five thousand, two hundred eighty-one".