55020647 has 8 divisors (see below), whose sum is σ = 61486992. Its totient is φ = 48798400.

The previous prime is 55020587. The next prime is 55020661. The reversal of 55020647 is 74602055.

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 55020647 - 2⁶ = 55020583 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 (55020677) 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, 60548 + ... + 61449.

It is an arithmetic number, because the mean of its divisors is an integer number (7685874).

Almost surely, 2^55020647 is an apocalyptic number.

55020647 is a deficient number, since it is larger than the sum of its proper divisors (6466345).

55020647 is a wasteful number, since it uses less digits than its factorization.

55020647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122049.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 55020647 is about 7417.5903769351. The cubic root of 55020647 is about 380.3428277344.

The spelling of 55020647 in words is "fifty-five million, twenty thousand, six hundred forty-seven".