8021216419 has 2 divisors, whose sum is σ = 8021216420. Its totient is φ = 8021216418.

The previous prime is 8021216389. The next prime is 8021216473. The reversal of 8021216419 is 9146121208.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8021216419 - 2⁵ = 8021216387 is a prime.

It is a super-2 number, since 2×8021216419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8021216479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010608209 + 4010608210.

It is an arithmetic number, because the mean of its divisors is an integer number (4010608210).

Almost surely, 2^8021216419 is an apocalyptic number.

8021216419 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021216419 is an equidigital number, since it uses as much as digits as its factorization.

8021216419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 8021216419 is about 89561.2439563007. The cubic root of 8021216419 is about 2001.7664742417.

The spelling of 8021216419 in words is "eight billion, twenty-one million, two hundred sixteen thousand, four hundred nineteen".