30311213131 has 2 divisors, whose sum is σ = 30311213132. Its totient is φ = 30311213130.

The previous prime is 30311213117. The next prime is 30311213213. The reversal of 30311213131 is 13131211303.

30311213131 = 71074² + 71075² + ... + 71079².

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30311213131 - 2⁵ = 30311213099 is a prime.

It is a super-2 number, since 2×30311213131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30311213099 and 30311213108.

It is not a weakly prime, because it can be changed into another prime (30311213431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155606565 + 15155606566.

It is an arithmetic number, because the mean of its divisors is an integer number (15155606566).

Almost surely, 2^30311213131 is an apocalyptic number.

30311213131 is a deficient number, since it is larger than the sum of its proper divisors (1).

30311213131 is an equidigital number, since it uses as much as digits as its factorization.

30311213131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 30311213131 its reverse (13131211303), we get a palindrome (43442424434).

The spelling of 30311213131 in words is "thirty billion, three hundred eleven million, two hundred thirteen thousand, one hundred thirty-one".