281465801 has 2 divisors, whose sum is σ = 281465802. Its totient is φ = 281465800.

The previous prime is 281465783. The next prime is 281465803. The reversal of 281465801 is 108564182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219040000 + 62425801 = 14800^2 + 7901^2 .

It is a cyclic number.

It is not a de Polignac number, because 281465801 - 2²⁶ = 214356937 is a prime.

Together with 281465803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (281465803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140732900 + 140732901.

It is an arithmetic number, because the mean of its divisors is an integer number (140732901).

Almost surely, 2^281465801 is an apocalyptic number.

It is an amenable number.

281465801 is a deficient number, since it is larger than the sum of its proper divisors (1).

281465801 is an equidigital number, since it uses as much as digits as its factorization.

281465801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 281465801 is about 16776.9425402843. The cubic root of 281465801 is about 655.3528786339.

The spelling of 281465801 in words is "two hundred eighty-one million, four hundred sixty-five thousand, eight hundred one".