281201168 has 20 divisors (see below), whose sum is σ = 563615340. Its totient is φ = 135752064.

The previous prime is 281201161. The next prime is 281201189. The reversal of 281201168 is 861102182.

It can be written as a sum of positive squares in 2 ways, for example, as 150601984 + 130599184 = 12272^2 + 11428^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 281201168.

It is not an unprimeable number, because it can be changed into a prime (281201161) 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, 302555 + ... + 303482.

It is an arithmetic number, because the mean of its divisors is an integer number (28180767).

Almost surely, 2^281201168 is an apocalyptic number.

It is an amenable number.

281201168 is an abundant number, since it is smaller than the sum of its proper divisors (282414172).

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

281201168 is a wasteful number, since it uses less digits than its factorization.

281201168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606074 (or 606068 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 281201168 is about 16769.0538790953. The cubic root of 281201168 is about 655.1474275297.

The spelling of 281201168 in words is "two hundred eighty-one million, two hundred one thousand, one hundred sixty-eight".