55606021 has 8 divisors (see below), whose sum is σ = 57830400. Its totient is φ = 53402160.

The previous prime is 55606007. The next prime is 55606037. The reversal of 55606021 is 12060655.

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

It is a cyclic number.

It is not a de Polignac number, because 55606021 - 2¹¹ = 55603973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55606091) 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, 520 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (7228800).

Almost surely, 2^55606021 is an apocalyptic number.

It is an amenable number.

55606021 is a deficient number, since it is larger than the sum of its proper divisors (2224379).

55606021 is a wasteful number, since it uses less digits than its factorization.

55606021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10259.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 55606021 is about 7456.9444814884. The cubic root of 55606021 is about 381.6869162443.

Adding to 55606021 its reverse (12060655), we get a palindrome (67666676).

The spelling of 55606021 in words is "fifty-five million, six hundred six thousand, twenty-one".