278201055 has 16 divisors (see below), whose sum is σ = 485587584. Its totient is φ = 134885280.

The previous prime is 278201009. The next prime is 278201057. The reversal of 278201055 is 550102872.

It is not a de Polignac number, because 278201055 - 2⁹ = 278200543 is a prime.

It is a super-2 number, since 2×278201055² = 154791654006226050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278201057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842869 + ... + 843198.

It is an arithmetic number, because the mean of its divisors is an integer number (30349224).

Almost surely, 2^278201055 is an apocalyptic number.

278201055 is a deficient number, since it is larger than the sum of its proper divisors (207386529).

278201055 is a wasteful number, since it uses less digits than its factorization.

278201055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686086.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 278201055 is about 16679.3601495981. The cubic root of 278201055 is about 652.8091868608.

The spelling of 278201055 in words is "two hundred seventy-eight million, two hundred one thousand, fifty-five".