278013223281 has 32 divisors (see below), whose sum is σ = 391700155392. Its totient is φ = 175040965440.

The previous prime is 278013223277. The next prime is 278013223343. The reversal of 278013223281 is 182322310872.

It is not a de Polignac number, because 278013223281 - 2² = 278013223277 is a prime.

It is a super-2 number, since 2×278013223281² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (278013223381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9956766 + ... + 9984648.

It is an arithmetic number, because the mean of its divisors is an integer number (12240629856).

Almost surely, 2^278013223281 is an apocalyptic number.

It is an amenable number.

278013223281 is a deficient number, since it is larger than the sum of its proper divisors (113686932111).

278013223281 is a wasteful number, since it uses less digits than its factorization.

278013223281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29733.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 278013223281 in words is "two hundred seventy-eight billion, thirteen million, two hundred twenty-three thousand, two hundred eighty-one".