30312131033 has 4 divisors (see below), whose sum is σ = 30739062528. Its totient is φ = 29885199540.

The previous prime is 30312131021. The next prime is 30312131063. The reversal of 30312131033 is 33013121303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312131033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30312130996 and 30312131014.

It is not an unprimeable number, because it can be changed into a prime (30312131063) 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, 213465641 + ... + 213465782.

It is an arithmetic number, because the mean of its divisors is an integer number (7684765632).

Almost surely, 2^30312131033 is an apocalyptic number.

It is an amenable number.

30312131033 is a deficient number, since it is larger than the sum of its proper divisors (426931495).

30312131033 is an equidigital number, since it uses as much as digits as its factorization.

30312131033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426931494.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 30312131033 its reverse (33013121303), we get a palindrome (63325252336).

The spelling of 30312131033 in words is "thirty billion, three hundred twelve million, one hundred thirty-one thousand, thirty-three".