8221403461 has 2 divisors, whose sum is σ = 8221403462. Its totient is φ = 8221403460.

The previous prime is 8221403413. The next prime is 8221403471. The reversal of 8221403461 is 1643041228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5239588225 + 2981815236 = 72385^2 + 54606^2 .

It is a cyclic number.

It is not a de Polignac number, because 8221403461 - 2¹⁵ = 8221370693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8221403471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110701730 + 4110701731.

It is an arithmetic number, because the mean of its divisors is an integer number (4110701731).

Almost surely, 2^8221403461 is an apocalyptic number.

It is an amenable number.

8221403461 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221403461 is an equidigital number, since it uses as much as digits as its factorization.

8221403461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 8221403461 is about 90671.9552066680. The cubic root of 8221403461 is about 2018.2826514878.

Adding to 8221403461 its reverse (1643041228), we get a palindrome (9864444689).

The spelling of 8221403461 in words is "eight billion, two hundred twenty-one million, four hundred three thousand, four hundred sixty-one".