55445155 has 8 divisors (see below), whose sum is σ = 67789872. Its totient is φ = 43519008.

The previous prime is 55445141. The next prime is 55445167. The reversal of 55445155 is 55154455.

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

It is a cyclic number.

It is not a de Polignac number, because 55445155 - 2²¹ = 53348003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55445155.

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, 104349 + ... + 104878.

It is an arithmetic number, because the mean of its divisors is an integer number (8473734).

Almost surely, 2^55445155 is an apocalyptic number.

55445155 is a deficient number, since it is larger than the sum of its proper divisors (12344717).

55445155 is a wasteful number, since it uses less digits than its factorization.

55445155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209285.

The product of its digits is 50000, while the sum is 34.

The square root of 55445155 is about 7446.1503476629. The cubic root of 55445155 is about 381.3184923975.

The spelling of 55445155 in words is "fifty-five million, four hundred forty-five thousand, one hundred fifty-five".