8461538531 has 2 divisors, whose sum is σ = 8461538532. Its totient is φ = 8461538530.

The previous prime is 8461538497. The next prime is 8461538587. The reversal of 8461538531 is 1358351648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8461538531 - 2¹⁰ = 8461537507 is a prime.

It is a super-2 number, since 2×8461538531² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8461538431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4230769265 + 4230769266.

It is an arithmetic number, because the mean of its divisors is an integer number (4230769266).

Almost surely, 2^8461538531 is an apocalyptic number.

8461538531 is a deficient number, since it is larger than the sum of its proper divisors (1).

8461538531 is an equidigital number, since it uses as much as digits as its factorization.

8461538531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 8461538531 is about 91986.6214783433. The cubic root of 8461538531 is about 2037.7447307675.

The spelling of 8461538531 in words is "eight billion, four hundred sixty-one million, five hundred thirty-eight thousand, five hundred thirty-one".