8467311521 has 2 divisors, whose sum is σ = 8467311522. Its totient is φ = 8467311520.

The previous prime is 8467311497. The next prime is 8467311551. The reversal of 8467311521 is 1251137648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8461240225 + 6071296 = 91985^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 8467311521 - 2¹⁰ = 8467310497 is a prime.

It is not a weakly prime, because it can be changed into another prime (8467311551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4233655760 + 4233655761.

It is an arithmetic number, because the mean of its divisors is an integer number (4233655761).

Almost surely, 2^8467311521 is an apocalyptic number.

It is an amenable number.

8467311521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8467311521 is an equidigital number, since it uses as much as digits as its factorization.

8467311521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 8467311521 is about 92017.9956367231. The cubic root of 8467311521 is about 2038.2080509849.

The spelling of 8467311521 in words is "eight billion, four hundred sixty-seven million, three hundred eleven thousand, five hundred twenty-one".