221419055 has 16 divisors (see below), whose sum is σ = 312155424. Its totient is φ = 148644480.

The previous prime is 221419043. The next prime is 221419061. The reversal of 221419055 is 550914122.

It is a de Polignac number, because none of the positive numbers 2^k-221419055 is a prime.

It is a Duffinian number.

It is a congruent 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, 154124 + ... + 155553.

It is an arithmetic number, because the mean of its divisors is an integer number (19509714).

Almost surely, 2^221419055 is an apocalyptic number.

221419055 is a deficient number, since it is larger than the sum of its proper divisors (90736369).

221419055 is a wasteful number, since it uses less digits than its factorization.

221419055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309706.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 221419055 is about 14880.1564171886. The cubic root of 221419055 is about 604.9762575206.

The spelling of 221419055 in words is "two hundred twenty-one million, four hundred nineteen thousand, fifty-five".