55216415 has 4 divisors (see below), whose sum is σ = 66259704. Its totient is φ = 44173128.

The previous prime is 55216411. The next prime is 55216417. The reversal of 55216415 is 51461255.

It is a happy number.

55216415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51461255 = 5 ⋅10292251.

It is a cyclic number.

It is not a de Polignac number, because 55216415 - 2² = 55216411 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 (55216411) 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, 5521637 + ... + 5521646.

It is an arithmetic number, because the mean of its divisors is an integer number (16564926).

Almost surely, 2^55216415 is an apocalyptic number.

55216415 is a deficient number, since it is larger than the sum of its proper divisors (11043289).

55216415 is a wasteful number, since it uses less digits than its factorization.

55216415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043288.

The product of its digits is 6000, while the sum is 29.

The square root of 55216415 is about 7430.7748586537. The cubic root of 55216415 is about 380.7933908262.

The spelling of 55216415 in words is "fifty-five million, two hundred sixteen thousand, four hundred fifteen".