55810001 has 8 divisors (see below), whose sum is σ = 61501440. Its totient is φ = 50318352.

The previous prime is 55809991. The next prime is 55810021. The reversal of 55810001 is 10001855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55810001 is a prime.

It is a super-2 number, since 2×55810001² = 6229512423240002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55810021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49361 + ... + 50478.

It is an arithmetic number, because the mean of its divisors is an integer number (7687680).

Almost surely, 2^55810001 is an apocalyptic number.

It is an amenable number.

55810001 is a deficient number, since it is larger than the sum of its proper divisors (5691439).

55810001 is a wasteful number, since it uses less digits than its factorization.

55810001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99895.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 55810001 is about 7470.6091451769. The cubic root of 55810001 is about 382.1530617491.

Adding to 55810001 its reverse (10001855), we get a palindrome (65811856).

The spelling of 55810001 in words is "fifty-five million, eight hundred ten thousand, one".