31304131305 has 32 divisors (see below), whose sum is σ = 50321969280. Its totient is φ = 16617269760.

The previous prime is 31304131289. The next prime is 31304131307. The reversal of 31304131305 is 50313140313.

It is not a de Polignac number, because 31304131305 - 2⁴ = 31304131289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31304131307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2909626 + ... + 2920364.

It is an arithmetic number, because the mean of its divisors is an integer number (1572561540).

Almost surely, 2^31304131305 is an apocalyptic number.

It is an amenable number.

31304131305 is a deficient number, since it is larger than the sum of its proper divisors (19017837975).

31304131305 is a wasteful number, since it uses less digits than its factorization.

31304131305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11641.

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 31304131305 its reverse (50313140313), we get a palindrome (81617271618).

The spelling of 31304131305 in words is "thirty-one billion, three hundred four million, one hundred thirty-one thousand, three hundred five".