281616061 has 2 divisors, whose sum is σ = 281616062. Its totient is φ = 281616060.

The previous prime is 281616053. The next prime is 281616079. The reversal of 281616061 is 160616182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281232900 + 383161 = 16770^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 281616061 - 2³ = 281616053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281616011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140808030 + 140808031.

It is an arithmetic number, because the mean of its divisors is an integer number (140808031).

Almost surely, 2^281616061 is an apocalyptic number.

It is an amenable number.

281616061 is a deficient number, since it is larger than the sum of its proper divisors (1).

281616061 is an equidigital number, since it uses as much as digits as its factorization.

281616061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 281616061 is about 16781.4201127318. The cubic root of 281616061 is about 655.4694775305.

The spelling of 281616061 in words is "two hundred eighty-one million, six hundred sixteen thousand, sixty-one".