1021531163 has 2 divisors, whose sum is σ = 1021531164. Its totient is φ = 1021531162.

The previous prime is 1021531129. The next prime is 1021531243. The reversal of 1021531163 is 3611351201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021531163 - 2⁸ = 1021530907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1021531123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510765581 + 510765582.

It is an arithmetic number, because the mean of its divisors is an integer number (510765582).

Almost surely, 2^1021531163 is an apocalyptic number.

1021531163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021531163 is an equidigital number, since it uses as much as digits as its factorization.

1021531163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1021531163 is about 31961.4011426283. The cubic root of 1021531163 is about 1007.1261516689.

Adding to 1021531163 its reverse (3611351201), we get a palindrome (4632882364).

The spelling of 1021531163 in words is "one billion, twenty-one million, five hundred thirty-one thousand, one hundred sixty-three".