55812101 has 8 divisors (see below), whose sum is σ = 58838400. Its totient is φ = 52794720.

The previous prime is 55812091. The next prime is 55812131. The reversal of 55812101 is 10121855.

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-55812101 is a prime.

It is a super-3 number, since 3×55812101³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55812131) 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, 13556 + ... + 17186.

It is an arithmetic number, because the mean of its divisors is an integer number (7354800).

Almost surely, 2^55812101 is an apocalyptic number.

It is an amenable number.

55812101 is a deficient number, since it is larger than the sum of its proper divisors (3026299).

55812101 is a wasteful number, since it uses less digits than its factorization.

55812101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4459.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 55812101 is about 7470.7496946424. The cubic root of 55812101 is about 382.1578548648.

Adding to 55812101 its reverse (10121855), we get a palindrome (65933956).

The spelling of 55812101 in words is "fifty-five million, eight hundred twelve thousand, one hundred one".