8213328261 has 8 divisors (see below), whose sum is σ = 12167893760. Its totient is φ = 5475552156.

The previous prime is 8213328259. The next prime is 8213328281. The reversal of 8213328261 is 1628233128.

It is not a de Polignac number, because 8213328261 - 2¹ = 8213328259 is a prime.

It is a super-2 number, since 2×8213328261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213328281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152098645 + ... + 152098698.

It is an arithmetic number, because the mean of its divisors is an integer number (1520986720).

Almost surely, 2^8213328261 is an apocalyptic number.

It is an amenable number.

8213328261 is a deficient number, since it is larger than the sum of its proper divisors (3954565499).

8213328261 is a wasteful number, since it uses less digits than its factorization.

8213328261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304197352 (or 304197346 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 8213328261 is about 90627.4145112835. The cubic root of 8213328261 is about 2017.6216380276.

The spelling of 8213328261 in words is "eight billion, two hundred thirteen million, three hundred twenty-eight thousand, two hundred sixty-one".