55503805 has 16 divisors (see below), whose sum is σ = 77258880. Its totient is φ = 37490112.

The previous prime is 55503797. The next prime is 55503809. The reversal of 55503805 is 50830555.

It is a cyclic number.

It is not a de Polignac number, because 55503805 - 2³ = 55503797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55503809) 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, 9490 + ... + 14179.

It is an arithmetic number, because the mean of its divisors is an integer number (4828680).

Almost surely, 2^55503805 is an apocalyptic number.

It is an amenable number.

55503805 is a deficient number, since it is larger than the sum of its proper divisors (21755075).

55503805 is a wasteful number, since it uses less digits than its factorization.

55503805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23748.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 55503805 is about 7450.0875833778. The cubic root of 55503805 is about 381.4528981812.

The spelling of 55503805 in words is "fifty-five million, five hundred three thousand, eight hundred five".