281542228 has 24 divisors (see below), whose sum is σ = 565780320. Its totient is φ = 121237920.

The previous prime is 281542211. The next prime is 281542231. The reversal of 281542228 is 822245182.

It is a super-2 number, since 2×281542228² = 158532052294407968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 281542193 and 281542202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167551 + ... + 169222.

It is an arithmetic number, because the mean of its divisors is an integer number (23574180).

Almost surely, 2^281542228 is an apocalyptic number.

It is an amenable number.

281542228 is an abundant number, since it is smaller than the sum of its proper divisors (284238092).

281542228 is a wasteful number, since it uses less digits than its factorization.

281542228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336807 (or 336805 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 281542228 is about 16779.2201249045. The cubic root of 281542228 is about 655.4121897137.

The spelling of 281542228 in words is "two hundred eighty-one million, five hundred forty-two thousand, two hundred twenty-eight".