278053225 has 6 divisors (see below), whose sum is σ = 344786030. Its totient is φ = 222442560.

The previous prime is 278053213. The next prime is 278053231. The reversal of 278053225 is 522350872.

It can be written as a sum of positive squares in 3 ways, for example, as 52693081 + 225360144 = 7259^2 + 15012^2 .

It is not a de Polignac number, because 278053225 - 2²¹ = 275956073 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5561040 + ... + 5561089.

Almost surely, 2^278053225 is an apocalyptic number.

278053225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

278053225 is a deficient number, since it is larger than the sum of its proper divisors (66732805).

278053225 is a wasteful number, since it uses less digits than its factorization.

278053225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122139 (or 11122134 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 278053225 is about 16674.9280358267. The cubic root of 278053225 is about 652.6935368313.

The spelling of 278053225 in words is "two hundred seventy-eight million, fifty-three thousand, two hundred twenty-five".