8820270521 has 2 divisors, whose sum is σ = 8820270522. Its totient is φ = 8820270520.

The previous prime is 8820270499. The next prime is 8820270577. The reversal of 8820270521 is 1250720288.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8526490921 + 293779600 = 92339^2 + 17140^2 .

It is a cyclic number.

It is not a de Polignac number, because 8820270521 - 2⁶ = 8820270457 is a prime.

It is a super-2 number, since 2×8820270521² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8820270581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4410135260 + 4410135261.

It is an arithmetic number, because the mean of its divisors is an integer number (4410135261).

Almost surely, 2^8820270521 is an apocalyptic number.

It is an amenable number.

8820270521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8820270521 is an equidigital number, since it uses as much as digits as its factorization.

8820270521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 8820270521 is about 93916.2952900081. The cubic root of 8820270521 is about 2066.1442316481.

The spelling of 8820270521 in words is "eight billion, eight hundred twenty million, two hundred seventy thousand, five hundred twenty-one".