6809220252 has 18 divisors (see below), whose sum is σ = 17212195728. Its totient is φ = 2269740072.

The previous prime is 6809220233. The next prime is 6809220283. The reversal of 6809220252 is 2520229086.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 189145007 = 6809220252 / (6 + 8 + 0 + 9 + 2 + 2 + 0 + 2 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94572468 + ... + 94572539.

It is an arithmetic number, because the mean of its divisors is an integer number (956233096).

Almost surely, 2^6809220252 is an apocalyptic number.

It is an amenable number.

6809220252 is an abundant number, since it is smaller than the sum of its proper divisors (10402975476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6809220252 is a wasteful number, since it uses less digits than its factorization.

6809220252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189145017 (or 189145012 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6809220252 is about 82517.9995637315. Note that the first 3 decimals coincide. The cubic root of 6809220252 is about 1895.3923672417.

The spelling of 6809220252 in words is "six billion, eight hundred nine million, two hundred twenty thousand, two hundred fifty-two".