281603056 has 20 divisors (see below), whose sum is σ = 623549872. Its totient is φ = 120686976.

The previous prime is 281603051. The next prime is 281603059. The reversal of 281603056 is 650306182.

It is a super-2 number, since 2×281603056² = 158600562297078272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281603051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257045 + ... + 1257268.

Almost surely, 2^281603056 is an apocalyptic number.

It is an amenable number.

281603056 is an abundant number, since it is smaller than the sum of its proper divisors (341946816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281603056 is a wasteful number, since it uses less digits than its factorization.

281603056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514328 (or 2514322 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 281603056 is about 16781.0326261527. The cubic root of 281603056 is about 655.4593875380.

The spelling of 281603056 in words is "two hundred eighty-one million, six hundred three thousand, fifty-six".