30311521231013 has 16 divisors (see below), whose sum is σ = 33281630500416. Its totient is φ = 27377283104640.

The previous prime is 30311521231001. The next prime is 30311521231087. The reversal of 30311521231013 is 31013212511303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30311521231013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311521236013) 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, 2163995 + ... + 8081207.

It is an arithmetic number, because the mean of its divisors is an integer number (2080101906276).

Almost surely, 2^{30311521231013} is an apocalyptic number.

It is an amenable number.

30311521231013 is a deficient number, since it is larger than the sum of its proper divisors (2970109269403).

30311521231013 is a wasteful number, since it uses less digits than its factorization.

30311521231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920244.

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 30311521231013 its reverse (31013212511303), we get a palindrome (61324733742316).

The spelling of 30311521231013 in words is "thirty trillion, three hundred eleven billion, five hundred twenty-one million, two hundred thirty-one thousand, thirteen".