55996905 has 16 divisors (see below), whose sum is σ = 89706240. Its totient is φ = 29827968.

The previous prime is 55996903. The next prime is 55996909. The reversal of 55996905 is 50969955.

It is not a de Polignac number, because 55996905 - 2¹ = 55996903 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55996903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13789 + ... + 17381.

It is an arithmetic number, because the mean of its divisors is an integer number (5606640).

Almost surely, 2^55996905 is an apocalyptic number.

It is an amenable number.

55996905 is a deficient number, since it is larger than the sum of its proper divisors (33709335).

55996905 is a wasteful number, since it uses less digits than its factorization.

55996905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640.

The product of its (nonzero) digits is 546750, while the sum is 48.

The square root of 55996905 is about 7483.1079773046. The cubic root of 55996905 is about 382.5791881841.

The spelling of 55996905 in words is "fifty-five million, nine hundred ninety-six thousand, nine hundred five".