1020031305 has 8 divisors (see below), whose sum is σ = 1632050112. Its totient is φ = 544016688.

The previous prime is 1020031303. The next prime is 1020031357. The reversal of 1020031305 is 5031300201.

It is a happy number.

1020031305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1020031305 - 2¹ = 1020031303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 68002087 = 1020031305 / (1 + 0 + 2 + 0 + 0 + 3 + 1 + 3 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (1020031303) 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, 34001029 + ... + 34001058.

It is an arithmetic number, because the mean of its divisors is an integer number (204006264).

Almost surely, 2^1020031305 is an apocalyptic number.

1020031305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020031305 is a deficient number, since it is larger than the sum of its proper divisors (612018807).

1020031305 is an equidigital number, since it uses as much as digits as its factorization.

1020031305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68002095.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1020031305 is about 31937.9289403681. The cubic root of 1020031305 is about 1006.6330075998.

Adding to 1020031305 its reverse (5031300201), we get a palindrome (6051331506).

The spelling of 1020031305 in words is "one billion, twenty million, thirty-one thousand, three hundred five".