55499505 has 16 divisors (see below), whose sum is σ = 89092224. Its totient is φ = 29502080.

The previous prime is 55499501. The next prime is 55499531. The reversal of 55499505 is 50599455.

It is not a de Polignac number, because 55499505 - 2² = 55499501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55499501) 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, 1284 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (5568264).

Almost surely, 2^55499505 is an apocalyptic number.

It is an amenable number.

55499505 is a deficient number, since it is larger than the sum of its proper divisors (33592719).

55499505 is a wasteful number, since it uses less digits than its factorization.

55499505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12216.

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 55499505 is about 7449.7989905769. The cubic root of 55499505 is about 381.4430472660.

The spelling of 55499505 in words is "fifty-five million, four hundred ninety-nine thousand, five hundred five".