1000131031 has 4 divisors (see below), whose sum is σ = 1000979064. Its totient is φ = 999283000.

The previous prime is 1000131019. The next prime is 1000131037. The reversal of 1000131031 is 1301310001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000131031 - 2⁷ = 1000130903 is a prime.

It is a super-2 number, since 2×1000131031² = 2000524158338245922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000130999 and 1000131017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000131037) 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 in 3 ways as a sum of consecutive naturals, for example, 422245 + ... + 424606.

It is an arithmetic number, because the mean of its divisors is an integer number (250244766).

Almost surely, 2^1000131031 is an apocalyptic number.

1000131031 is a deficient number, since it is larger than the sum of its proper divisors (848033).

1000131031 is an equidigital number, since it uses as much as digits as its factorization.

1000131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848032.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 1000131031 is about 31624.8483158418. The cubic root of 1000131031 is about 1000.0436750925.

Adding to 1000131031 its reverse (1301310001), we get a palindrome (2301441032).

The spelling of 1000131031 in words is "one billion, one hundred thirty-one thousand, thirty-one".