30000071513 has 4 divisors (see below), whose sum is σ = 31764781620. Its totient is φ = 28235361408.

The previous prime is 30000071509. The next prime is 30000071537. The reversal of 30000071513 is 31517000003.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28169258569 + 1830812944 = 167837^2 + 42788^2 .

It is a cyclic number.

It is not a de Polignac number, because 30000071513 - 2² = 30000071509 is a prime.

It is a super-2 number, since 2×30000071513² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30000071503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882355028 + ... + 882355061.

It is an arithmetic number, because the mean of its divisors is an integer number (7941195405).

Almost surely, 2^30000071513 is an apocalyptic number.

It is an amenable number.

30000071513 is a deficient number, since it is larger than the sum of its proper divisors (1764710107).

30000071513 is a wasteful number, since it uses less digits than its factorization.

30000071513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764710106.

The product of its (nonzero) digits is 315, while the sum is 20.

Adding to 30000071513 its reverse (31517000003), we get a palindrome (61517071516).

The spelling of 30000071513 in words is "thirty billion, seventy-one thousand, five hundred thirteen".