8221403401 has 4 divisors (see below), whose sum is σ = 8504900100. Its totient is φ = 7937906704.

The previous prime is 8221403347. The next prime is 8221403413. The reversal of 8221403401 is 1043041228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7050121225 + 1171282176 = 83965^2 + 34224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8221403401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221403461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141748306 + ... + 141748363.

It is an arithmetic number, because the mean of its divisors is an integer number (2126225025).

Almost surely, 2^8221403401 is an apocalyptic number.

It is an amenable number.

8221403401 is a deficient number, since it is larger than the sum of its proper divisors (283496699).

8221403401 is a wasteful number, since it uses less digits than its factorization.

8221403401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283496698.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 8221403401 is about 90671.9548758049. The cubic root of 8221403401 is about 2018.2826465780.

Adding to 8221403401 its reverse (1043041228), we get a palindrome (9264444629).

The spelling of 8221403401 in words is "eight billion, two hundred twenty-one million, four hundred three thousand, four hundred one".