281166401 has 8 divisors (see below), whose sum is σ = 284973024. Its totient is φ = 277369920.

The previous prime is 281166337. The next prime is 281166439. The reversal of 281166401 is 104661182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281166401 - 2⁶ = 281166337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281166491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65225 + ... + 69401.

It is an arithmetic number, because the mean of its divisors is an integer number (35621628).

Almost surely, 2^281166401 is an apocalyptic number.

It is an amenable number.

281166401 is a deficient number, since it is larger than the sum of its proper divisors (3806623).

281166401 is an equidigital number, since it uses as much as digits as its factorization.

281166401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 281166401 is about 16768.0172053824. The cubic root of 281166401 is about 655.1204261608.

The spelling of 281166401 in words is "two hundred eighty-one million, one hundred sixty-six thousand, four hundred one".