278053231 has 2 divisors, whose sum is σ = 278053232. Its totient is φ = 278053230.

The previous prime is 278053213. The next prime is 278053249. The reversal of 278053231 is 132350872.

Together with previous prime (278053213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (278053213) and next prime (278053249).

It is a cyclic number.

It is not a de Polignac number, because 278053231 - 2⁵ = 278053199 is a prime.

It is a super-2 number, since 2×278053231² = 154627198539078722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 278053193 and 278053202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278053931) 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 as a sum of consecutive naturals, namely, 139026615 + 139026616.

It is an arithmetic number, because the mean of its divisors is an integer number (139026616).

Almost surely, 2^278053231 is an apocalyptic number.

278053231 is a deficient number, since it is larger than the sum of its proper divisors (1).

278053231 is an equidigital number, since it uses as much as digits as its factorization.

278053231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 278053231 is about 16674.9282157375. The cubic root of 278053231 is about 652.6935415261.

The spelling of 278053231 in words is "two hundred seventy-eight million, fifty-three thousand, two hundred thirty-one".