1055533681 has 4 divisors (see below), whose sum is σ = 1067393700. Its totient is φ = 1043673664.

The previous prime is 1055533667. The next prime is 1055533697. The reversal of 1055533681 is 1863355501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 661312656 + 394221025 = 25716^2 + 19855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055533681 - 2⁵ = 1055533649 is a prime.

It is a super-2 number, since 2×1055533681² = 2228302703450819522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1055533681.

It is not an unprimeable number, because it can be changed into a prime (1055533631) 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 in 3 ways as a sum of consecutive naturals, for example, 5929876 + ... + 5930053.

It is an arithmetic number, because the mean of its divisors is an integer number (266848425).

Almost surely, 2^1055533681 is an apocalyptic number.

It is an amenable number.

1055533681 is a deficient number, since it is larger than the sum of its proper divisors (11860019).

1055533681 is an equidigital number, since it uses as much as digits as its factorization.

1055533681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11860018.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 1055533681 is about 32488.9778386455. The cubic root of 1055533681 is about 1018.1787572890.

The spelling of 1055533681 in words is "one billion, fifty-five million, five hundred thirty-three thousand, six hundred eighty-one".