1020320031 has 8 divisors (see below), whose sum is σ = 1363222144. Its totient is φ = 678815640.

The previous prime is 1020320027. The next prime is 1020320071. The reversal of 1020320031 is 1300230201.

It is a happy number.

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

It is not a de Polignac number, because 1020320031 - 2² = 1020320027 is a prime.

It is a super-2 number, since 2×1020320031² = 2082105931319681922, 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 = 1020319989 and 1020320016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020320071) 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 7 ways as a sum of consecutive naturals, for example, 347725 + ... + 350646.

It is an arithmetic number, because the mean of its divisors is an integer number (170402768).

Almost surely, 2^1020320031 is an apocalyptic number.

1020320031 is a deficient number, since it is larger than the sum of its proper divisors (342902113).

1020320031 is an equidigital number, since it uses as much as digits as its factorization.

1020320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698861.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1020320031 is about 31942.4487320556. The cubic root of 1020320031 is about 1006.7279764837.

Adding to 1020320031 its reverse (1300230201), we get a palindrome (2320550232).

The spelling of 1020320031 in words is "one billion, twenty million, three hundred twenty thousand, thirty-one".