55279663 has 4 divisors (see below), whose sum is σ = 55386288. Its totient is φ = 55173040.

The previous prime is 55279643. The next prime is 55279669. The reversal of 55279663 is 36697255.

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 55279663 - 2¹⁷ = 55148591 is a prime.

It is a super-3 number, since 3×55279663³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55279669) 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, 52531 + ... + 53572.

It is an arithmetic number, because the mean of its divisors is an integer number (13846572).

Almost surely, 2^55279663 is an apocalyptic number.

55279663 is a deficient number, since it is larger than the sum of its proper divisors (106625).

55279663 is a wasteful number, since it uses less digits than its factorization.

55279663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106624.

The product of its digits is 340200, while the sum is 43.

The square root of 55279663 is about 7435.0294552207. The cubic root of 55279663 is about 380.9387294322.

The spelling of 55279663 in words is "fifty-five million, two hundred seventy-nine thousand, six hundred sixty-three".