1013233561 has 2 divisors, whose sum is σ = 1013233562. Its totient is φ = 1013233560.

The previous prime is 1013233549. The next prime is 1013233603. The reversal of 1013233561 is 1653323101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631265625 + 381967936 = 25125^2 + 19544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013233561 - 2⁷ = 1013233433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1013233061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506616780 + 506616781.

It is an arithmetic number, because the mean of its divisors is an integer number (506616781).

Almost surely, 2^1013233561 is an apocalyptic number.

It is an amenable number.

1013233561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013233561 is an equidigital number, since it uses as much as digits as its factorization.

1013233561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1013233561 is about 31831.3298654015. The cubic root of 1013233561 is about 1004.3918702382.

Adding to 1013233561 its reverse (1653323101), we get a palindrome (2666556662).

The spelling of 1013233561 in words is "one billion, thirteen million, two hundred thirty-three thousand, five hundred sixty-one".