55805801 has 2 divisors, whose sum is σ = 55805802. Its totient is φ = 55805800.

The previous prime is 55805777. The next prime is 55805809. The reversal of 55805801 is 10850855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50069776 + 5736025 = 7076^2 + 2395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55805801 is a prime.

It is a super-2 number, since 2×55805801² = 6228574850503202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_3327458 and since 55805801 and 3327458 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (55805809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27902900 + 27902901.

It is an arithmetic number, because the mean of its divisors is an integer number (27902901).

Almost surely, 2^55805801 is an apocalyptic number.

It is an amenable number.

55805801 is a deficient number, since it is larger than the sum of its proper divisors (1).

55805801 is an equidigital number, since it uses as much as digits as its factorization.

55805801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8000, while the sum is 32.

The square root of 55805801 is about 7470.3280383126. The cubic root of 55805801 is about 382.1434751572.

The spelling of 55805801 in words is "fifty-five million, eight hundred five thousand, eight hundred one".