55216406 has 32 divisors (see below), whose sum is σ = 98461440. Its totient is φ = 22722336.

The previous prime is 55216393. The next prime is 55216411. The reversal of 55216406 is 60461255.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124421 + ... + 124863.

It is an arithmetic number, because the mean of its divisors is an integer number (3076920).

Almost surely, 2^55216406 is an apocalyptic number.

55216406 is a deficient number, since it is larger than the sum of its proper divisors (43245034).

55216406 is a wasteful number, since it uses less digits than its factorization.

55216406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55216406 is about 7430.7742530641. The cubic root of 55216406 is about 380.7933701371.

The spelling of 55216406 in words is "fifty-five million, two hundred sixteen thousand, four hundred six".