31311312003131 has 8 divisors (see below), whose sum is σ = 31354107085200. Its totient is φ = 31268518071840.

The previous prime is 31311312003119. The next prime is 31311312003151. The reversal of 31311312003131 is 13130021311313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311312003131 is a prime.

It is a super-2 number, since 2×31311312003131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31311312003097 and 31311312003106.

It is not an unprimeable number, because it can be changed into a prime (31311312003151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63946385 + ... + 64434173.

It is an arithmetic number, because the mean of its divisors is an integer number (3919263385650).

Almost surely, 2^{31311312003131} is an apocalyptic number.

31311312003131 is a deficient number, since it is larger than the sum of its proper divisors (42795082069).

31311312003131 is an equidigital number, since it uses as much as digits as its factorization.

31311312003131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575389.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31311312003131 its reverse (13130021311313), we get a palindrome (44441333314444).

The spelling of 31311312003131 in words is "thirty-one trillion, three hundred eleven billion, three hundred twelve million, three thousand, one hundred thirty-one".