281818061 has 24 divisors (see below), whose sum is σ = 349243200. Its totient is φ = 227269056.

The previous prime is 281817997. The next prime is 281818067. The reversal of 281818061 is 160818182.

It is not a de Polignac number, because 281818061 - 2⁶ = 281817997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281818067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97706 + ... + 100548.

It is an arithmetic number, because the mean of its divisors is an integer number (14551800).

Almost surely, 2^281818061 is an apocalyptic number.

It is an amenable number.

281818061 is a deficient number, since it is larger than the sum of its proper divisors (67425139).

281818061 is an equidigital number, since it uses as much as digits as its factorization.

281818061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2867 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 35.

The square root of 281818061 is about 16787.4375948207. The cubic root of 281818061 is about 655.6261603431.

The spelling of 281818061 in words is "two hundred eighty-one million, eight hundred eighteen thousand, sixty-one".