55627021 has 8 divisors (see below), whose sum is σ = 57224960. Its totient is φ = 54034128.

The previous prime is 55627001. The next prime is 55627027. The reversal of 55627021 is 12072655.

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 55627021 - 2¹¹ = 55624973 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 (55627027) 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, 37720 + ... + 39166.

It is an arithmetic number, because the mean of its divisors is an integer number (7153120).

Almost surely, 2^55627021 is an apocalyptic number.

It is an amenable number.

55627021 is a deficient number, since it is larger than the sum of its proper divisors (1597939).

55627021 is a wasteful number, since it uses less digits than its factorization.

55627021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 55627021 is about 7458.3524320053. The cubic root of 55627021 is about 381.7349591018.

Adding to 55627021 its reverse (12072655), we get a palindrome (67699676).

The spelling of 55627021 in words is "fifty-five million, six hundred twenty-seven thousand, twenty-one".