8210220129 has 16 divisors (see below), whose sum is σ = 12177037440. Its totient is φ = 5467293360.

The previous prime is 8210220101. The next prime is 8210220157. The reversal of 8210220129 is 9210220128.

It is an interprime number because it is at equal distance from previous prime (8210220101) and next prime (8210220157).

It is not a de Polignac number, because 8210220129 - 2⁸ = 8210219873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8210220199) 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, 147462 + ... + 195359.

It is an arithmetic number, because the mean of its divisors is an integer number (761064840).

Almost surely, 2^8210220129 is an apocalyptic number.

It is an amenable number.

8210220129 is a deficient number, since it is larger than the sum of its proper divisors (3966817311).

8210220129 is a wasteful number, since it uses less digits than its factorization.

8210220129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343717 (or 343711 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8210220129 is about 90610.2650310659. The cubic root of 8210220129 is about 2017.3670994944.

Subtracting 8210220129 from its reverse (9210220128), we obtain a palindrome (999999999).

The spelling of 8210220129 in words is "eight billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-nine".