8218220451 has 16 divisors (see below), whose sum is σ = 12605941248. Its totient is φ = 4665024000.

The previous prime is 8218220411. The next prime is 8218220503. The reversal of 8218220451 is 1540228128.

It is not a de Polignac number, because 8218220451 - 2⁷ = 8218220323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8218220411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1292670 + ... + 1299011.

It is an arithmetic number, because the mean of its divisors is an integer number (787871328).

Almost surely, 2^8218220451 is an apocalyptic number.

8218220451 is a deficient number, since it is larger than the sum of its proper divisors (4387720797).

8218220451 is a wasteful number, since it uses less digits than its factorization.

8218220451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591842.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 8218220451 is about 90654.4011672903. The cubic root of 8218220451 is about 2018.0221508267.

Adding to 8218220451 its reverse (1540228128), we get a palindrome (9758448579).

The spelling of 8218220451 in words is "eight billion, two hundred eighteen million, two hundred twenty thousand, four hundred fifty-one".