55216547 has 4 divisors (see below), whose sum is σ = 55330416. Its totient is φ = 55102680.

The previous prime is 55216541. The next prime is 55216559. The reversal of 55216547 is 74561255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55216547 - 2¹⁴ = 55200163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55216541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56204 + ... + 57177.

It is an arithmetic number, because the mean of its divisors is an integer number (13832604).

Almost surely, 2^55216547 is an apocalyptic number.

55216547 is a deficient number, since it is larger than the sum of its proper divisors (113869).

55216547 is a wasteful number, since it uses less digits than its factorization.

55216547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113868.

The product of its digits is 42000, while the sum is 35.

The square root of 55216547 is about 7430.7837406292. The cubic root of 55216547 is about 380.7936942667.

The spelling of 55216547 in words is "fifty-five million, two hundred sixteen thousand, five hundred forty-seven".