55558001 has 2 divisors, whose sum is σ = 55558002. Its totient is φ = 55558000.

The previous prime is 55557967. The next prime is 55558031. The reversal of 55558001 is 10085555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55115776 + 442225 = 7424^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 55558001 - 2⁶ = 55557937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55558031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27779000 + 27779001.

It is an arithmetic number, because the mean of its divisors is an integer number (27779001).

Almost surely, 2^55558001 is an apocalyptic number.

It is an amenable number.

55558001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55558001 is an equidigital number, since it uses as much as digits as its factorization.

55558001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 55558001 is about 7453.7239685945. The cubic root of 55558001 is about 381.5770127725.

The spelling of 55558001 in words is "fifty-five million, five hundred fifty-eight thousand, one".