55051555 has 16 divisors (see below), whose sum is σ = 72211104.
Its totient is φ = 40043520.
The previous prime is 55051537. The next prime is 55051583. The reversal of 55051555 is 55515055.
It is not a de Polignac number, because 55051555 - 27 = 55051427 is a prime.
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966 + ... + 10675.
It is an arithmetic number, because the mean of its divisors is an integer number (4513194).
Almost surely, 255051555 is an apocalyptic number.
55051555 is a deficient number, since it is larger than the sum of its proper divisors (17159549).
55051555 is a wasteful number, since it uses less digits than its factorization.
55051555 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12726.
The product of its (nonzero) digits is 15625, while the sum is 31.
The square root of 55051555 is about 7419.6735103372.
The cubic root of 55051555 is about 380.4140339463.
The spelling of 55051555 in words is "fifty-five million, fifty-one thousand, five hundred fifty-five".