30512123513 has 4 divisors (see below), whose sum is σ = 30540040548. Its totient is φ = 30484206480.

The previous prime is 30512123501. The next prime is 30512123557. The reversal of 30512123513 is 31532121503.

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 17043824704 + 13468298809 = 130552^2 + 116053^2 .

It is a cyclic number.

It is not a de Polignac number, because 30512123513 - 2³⁴ = 13332254329 is a prime.

It is a super-2 number, since 2×30512123513² (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 (30512173513) 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, 13956878 + ... + 13959063.

It is an arithmetic number, because the mean of its divisors is an integer number (7635010137).

Almost surely, 2^30512123513 is an apocalyptic number.

It is an amenable number.

30512123513 is a deficient number, since it is larger than the sum of its proper divisors (27917035).

30512123513 is a wasteful number, since it uses less digits than its factorization.

30512123513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27917034.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 30512123513 in words is "thirty billion, five hundred twelve million, one hundred twenty-three thousand, five hundred thirteen".