30312131333131 has 16 divisors (see below), whose sum is σ = 32087613650400. Its totient is φ = 28585373660928.

The previous prime is 30312131333087. The next prime is 30312131333147. The reversal of 30312131333131 is 13133313121303.

It is a de Polignac number, because none of the positive numbers 2^k-30312131333131 is a prime.

It is a super-2 number, since 2×30312131333131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30312131333131.

It is not an unprimeable number, because it can be changed into a prime (30312131333431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41734935 + ... + 42455023.

It is an arithmetic number, because the mean of its divisors is an integer number (2005475853150).

Almost surely, 2^{30312131333131} is an apocalyptic number.

30312131333131 is a deficient number, since it is larger than the sum of its proper divisors (1775482317269).

30312131333131 is a wasteful number, since it uses less digits than its factorization.

30312131333131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753918.

The product of its (nonzero) digits is 4374, while the sum is 28.

Adding to 30312131333131 its reverse (13133313121303), we get a palindrome (43445444454434).

The spelling of 30312131333131 in words is "thirty trillion, three hundred twelve billion, one hundred thirty-one million, three hundred thirty-three thousand, one hundred thirty-one".