30515152123 has 4 divisors (see below), whose sum is σ = 31259424168. Its totient is φ = 29770880080.

The previous prime is 30515152093. The next prime is 30515152153. The reversal of 30515152123 is 32125151503.

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

It is an interprime number because it is at equal distance from previous prime (30515152093) and next prime (30515152153).

It is a cyclic number.

It is not a de Polignac number, because 30515152123 - 2⁵ = 30515152091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30515152091 and 30515152100.

It is not an unprimeable number, because it can be changed into a prime (30515152153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372135961 + ... + 372136042.

It is an arithmetic number, because the mean of its divisors is an integer number (7814856042).

Almost surely, 2^30515152123 is an apocalyptic number.

30515152123 is a deficient number, since it is larger than the sum of its proper divisors (744272045).

30515152123 is an equidigital number, since it uses as much as digits as its factorization.

30515152123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744272044.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 30515152123 in words is "thirty billion, five hundred fifteen million, one hundred fifty-two thousand, one hundred twenty-three".