55016405 has 8 divisors (see below), whose sum is σ = 66121272. Its totient is φ = 43945408.

The previous prime is 55016399. The next prime is 55016407. The reversal of 55016405 is 50461055.

It can be written as a sum of positive squares in 4 ways, for example, as 26894596 + 28121809 = 5186^2 + 5303^2 .

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 55016405 - 2⁶ = 55016341 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 (55016407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4742 + ... + 11511.

It is an arithmetic number, because the mean of its divisors is an integer number (8265159).

Almost surely, 2^55016405 is an apocalyptic number.

It is an amenable number.

55016405 is a deficient number, since it is larger than the sum of its proper divisors (11104867).

55016405 is a wasteful number, since it uses less digits than its factorization.

55016405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55016405 is about 7417.3044295081. The cubic root of 55016405 is about 380.3330528842. Note that the first 3 decimals are identical.

The spelling of 55016405 in words is "fifty-five million, sixteen thousand, four hundred five".