278345151 has 24 divisors (see below), whose sum is σ = 460031520. Its totient is φ = 158867136.

The previous prime is 278345147. The next prime is 278345153. The reversal of 278345151 is 151543872.

It is not a de Polignac number, because 278345151 - 2² = 278345147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278345153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65281 + ... + 69413.

It is an arithmetic number, because the mean of its divisors is an integer number (19167980).

Almost surely, 2^278345151 is an apocalyptic number.

278345151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

278345151 is a deficient number, since it is larger than the sum of its proper divisors (181686369).

278345151 is a wasteful number, since it uses less digits than its factorization.

278345151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215 (or 5212 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 278345151 is about 16683.6791805645. The cubic root of 278345151 is about 652.9218762925.

The spelling of 278345151 in words is "two hundred seventy-eight million, three hundred forty-five thousand, one hundred fifty-one".