31312033129 has 4 divisors (see below), whose sum is σ = 33720651076. Its totient is φ = 28903415184.

The previous prime is 31312033127. The next prime is 31312033141. The reversal of 31312033129 is 92133021313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92133021313 = 17 ⋅5419589489.

It can be written as a sum of positive squares in 2 ways, for example, as 1836293904 + 29475739225 = 42852^2 + 171685^2 .

It is a cyclic number.

It is not a de Polignac number, because 31312033129 - 2¹ = 31312033127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312033097 and 31312033106.

It is not an unprimeable number, because it can be changed into a prime (31312033127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204308954 + ... + 1204308979.

It is an arithmetic number, because the mean of its divisors is an integer number (8430162769).

Almost surely, 2^31312033129 is an apocalyptic number.

It is an amenable number.

31312033129 is a deficient number, since it is larger than the sum of its proper divisors (2408617947).

31312033129 is a wasteful number, since it uses less digits than its factorization.

31312033129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408617946.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 31312033129 in words is "thirty-one billion, three hundred twelve million, thirty-three thousand, one hundred twenty-nine".