55910215 has 4 divisors (see below), whose sum is σ = 67092264. Its totient is φ = 44728168.

The previous prime is 55910209. The next prime is 55910233. The reversal of 55910215 is 51201955.

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 55910215 - 2³ = 55910207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5591017 + ... + 5591026.

It is an arithmetic number, because the mean of its divisors is an integer number (16773066).

Almost surely, 2^55910215 is an apocalyptic number.

55910215 is a deficient number, since it is larger than the sum of its proper divisors (11182049).

55910215 is a wasteful number, since it uses less digits than its factorization.

55910215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11182048.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 55910215 is about 7477.3133544075. The cubic root of 55910215 is about 382.3816598895.

The spelling of 55910215 in words is "fifty-five million, nine hundred ten thousand, two hundred fifteen".