1031009081 has 8 divisors (see below), whose sum is σ = 1092068424. Its totient is φ = 969995520.

The previous prime is 1031009071. The next prime is 1031009087. The reversal of 1031009081 is 1809001301.

It can be written as a sum of positive squares in 4 ways, for example, as 200647225 + 830361856 = 14165^2 + 28816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1031009081 - 2¹⁰ = 1031008057 is a prime.

It is a super-2 number, since 2×1031009081² = 2125959450208929122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1031009087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42131 + ... + 61943.

It is an arithmetic number, because the mean of its divisors is an integer number (136508553).

Almost surely, 2^1031009081 is an apocalyptic number.

It is an amenable number.

1031009081 is a deficient number, since it is larger than the sum of its proper divisors (61059343).

1031009081 is a wasteful number, since it uses less digits than its factorization.

1031009081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22891.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1031009081 is about 32109.3301238129. The cubic root of 1031009081 is about 1010.2313233509.

The spelling of 1031009081 in words is "one billion, thirty-one million, nine thousand, eighty-one".