278232231 has 8 divisors (see below), whose sum is σ = 379603840. Its totient is φ = 181174392.

The previous prime is 278232209. The next prime is 278232247. The reversal of 278232231 is 132232872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 278232231 - 2¹⁹ = 277707943 is a prime.

It is a super-2 number, since 2×278232231² = 154826348734474722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278232271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078291 + ... + 1078548.

It is an arithmetic number, because the mean of its divisors is an integer number (47450480).

Almost surely, 2^278232231 is an apocalyptic number.

278232231 is a deficient number, since it is larger than the sum of its proper divisors (101371609).

278232231 is a wasteful number, since it uses less digits than its factorization.

278232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156885.

The product of its digits is 8064, while the sum is 30.

The square root of 278232231 is about 16680.2946916414. The cubic root of 278232231 is about 652.8335711669.

The spelling of 278232231 in words is "two hundred seventy-eight million, two hundred thirty-two thousand, two hundred thirty-one".