55451555 has 8 divisors (see below), whose sum is σ = 66646800. Its totient is φ = 44291296.

The previous prime is 55451537. The next prime is 55451581. The reversal of 55451555 is 55515455.

It is a happy number.

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-55451555 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, 5120 + ... + 11709.

It is an arithmetic number, because the mean of its divisors is an integer number (8330850).

Almost surely, 2^55451555 is an apocalyptic number.

55451555 is a deficient number, since it is larger than the sum of its proper divisors (11195245).

55451555 is a wasteful number, since it uses less digits than its factorization.

55451555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17493.

The product of its digits is 62500, while the sum is 35.

The square root of 55451555 is about 7446.5800875301. The cubic root of 55451555 is about 381.3331636190. Note that the first 3 decimals are identical.

The spelling of 55451555 in words is "fifty-five million, four hundred fifty-one thousand, five hundred fifty-five".