55601021 has 8 divisors (see below), whose sum is σ = 65022144. Its totient is φ = 46549440.

The previous prime is 55601003. The next prime is 55601027. The reversal of 55601021 is 12010655.

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

It is not a de Polignac number, because 55601021 - 2⁶ = 55600957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55600984 and 55601002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55601027) 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, 92060 + ... + 92661.

It is an arithmetic number, because the mean of its divisors is an integer number (8127768).

Almost surely, 2^55601021 is an apocalyptic number.

It is an amenable number.

55601021 is a deficient number, since it is larger than the sum of its proper divisors (9421123).

55601021 is a wasteful number, since it uses less digits than its factorization.

55601021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184771.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 55601021 is about 7456.6092159909. The cubic root of 55601021 is about 381.6754756860.

Adding to 55601021 its reverse (12010655), we get a palindrome (67611676).

The spelling of 55601021 in words is "fifty-five million, six hundred one thousand, twenty-one".