8521057007 has 2 divisors, whose sum is σ = 8521057008. Its totient is φ = 8521057006.

The previous prime is 8521056989. The next prime is 8521057049. The reversal of 8521057007 is 7007501258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8521057007 - 2²² = 8516862703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8521057087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260528503 + 4260528504.

It is an arithmetic number, because the mean of its divisors is an integer number (4260528504).

Almost surely, 2^8521057007 is an apocalyptic number.

8521057007 is a deficient number, since it is larger than the sum of its proper divisors (1).

8521057007 is an equidigital number, since it uses as much as digits as its factorization.

8521057007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 8521057007 is about 92309.5715892994. The cubic root of 8521057007 is about 2042.5114051779.

The spelling of 8521057007 in words is "eight billion, five hundred twenty-one million, fifty-seven thousand, seven".