55506905 has 8 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 43652656.

The previous prime is 55506883. The next prime is 55506931. The reversal of 55506905 is 50960555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55506905 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93785 + ... + 94374.

It is an arithmetic number, because the mean of its divisors is an integer number (8467200).

Almost surely, 2^55506905 is an apocalyptic number.

It is an amenable number.

55506905 is a deficient number, since it is larger than the sum of its proper divisors (12230695).

55506905 is a wasteful number, since it uses less digits than its factorization.

55506905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188223.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 55506905 is about 7450.2956317182. The cubic root of 55506905 is about 381.4599996881.

The spelling of 55506905 in words is "fifty-five million, five hundred six thousand, nine hundred five".