55405706 has 8 divisors (see below), whose sum is σ = 83475360. Its totient is φ = 27580588.

The previous prime is 55405699. The next prime is 55405709. The reversal of 55405706 is 60750455.

It is a happy number.

55405706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55405709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60566 + ... + 61473.

It is an arithmetic number, because the mean of its divisors is an integer number (10434420).

Almost surely, 2^55405706 is an apocalyptic number.

55405706 is a deficient number, since it is larger than the sum of its proper divisors (28069654).

55405706 is a wasteful number, since it uses less digits than its factorization.

55405706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122268.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 55405706 is about 7443.5009236246. The cubic root of 55405706 is about 381.2280354272.

The spelling of 55405706 in words is "fifty-five million, four hundred five thousand, seven hundred six".