30321013 has 6 divisors (see below), whose sum is σ = 32209826. Its totient is φ = 28537152.

The previous prime is 30321001. The next prime is 30321023. The reversal of 30321013 is 31012303.

It can be written as a sum of positive squares in 3 ways, for example, as 4848804 + 25472209 = 2202^2 + 5047^2 .

It is not a de Polignac number, because 30321013 - 2⁵ = 30320981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30320984 and 30321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52170 + ... + 52747.

Almost surely, 2^30321013 is an apocalyptic number.

It is an amenable number.

30321013 is a deficient number, since it is larger than the sum of its proper divisors (1888813).

30321013 is a wasteful number, since it uses less digits than its factorization.

30321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104951 (or 104934 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30321013 is about 5506.4519429484. The cubic root of 30321013 is about 311.8276120063.

Adding to 30321013 its reverse (31012303), we get a palindrome (61333316).

It can be divided in two parts, 303 and 21013, that added together give a square (21316 = 146²).

The spelling of 30321013 in words is "thirty million, three hundred twenty-one thousand, thirteen".