278533241 has 8 divisors (see below), whose sum is σ = 320433024. Its totient is φ = 237160800.

The previous prime is 278533187. The next prime is 278533247. The reversal of 278533241 is 142335872.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278533241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278533247) 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, 130700 + ... + 132813.

It is an arithmetic number, because the mean of its divisors is an integer number (40054128).

Almost surely, 2^278533241 is an apocalyptic number.

It is an amenable number.

278533241 is a deficient number, since it is larger than the sum of its proper divisors (41899783).

278533241 is a wasteful number, since it uses less digits than its factorization.

278533241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263671.

The product of its digits is 40320, while the sum is 35.

The square root of 278533241 is about 16689.3151746859. The cubic root of 278533241 is about 653.0689124733.

The spelling of 278533241 in words is "two hundred seventy-eight million, five hundred thirty-three thousand, two hundred forty-one".