1115536621 has 2 divisors, whose sum is σ = 1115536622. Its totient is φ = 1115536620.

The previous prime is 1115536613. The next prime is 1115536673. The reversal of 1115536621 is 1266355111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712089225 + 403447396 = 26685^2 + 20086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115536621 - 2³ = 1115536613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115536691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557768310 + 557768311.

It is an arithmetic number, because the mean of its divisors is an integer number (557768311).

Almost surely, 2^1115536621 is an apocalyptic number.

It is an amenable number.

1115536621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115536621 is an equidigital number, since it uses as much as digits as its factorization.

1115536621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 1115536621 is about 33399.6500131364. The cubic root of 1115536621 is about 1037.1174558313.

The spelling of 1115536621 in words is "one billion, one hundred fifteen million, five hundred thirty-six thousand, six hundred twenty-one".