31285772851313 has 8 divisors (see below), whose sum is σ = 33126176031840. Its totient is φ = 29445376737600.

The previous prime is 31285772851309. The next prime is 31285772851331. The reversal of 31285772851313 is 31315827758213.

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

It is a cyclic number.

It is not a de Polignac number, because 31285772851313 - 2² = 31285772851309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31285772850313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9344738 + ... + 12243188.

It is an arithmetic number, because the mean of its divisors is an integer number (4140772003980).

Almost surely, 2^{31285772851313} is an apocalyptic number.

It is an amenable number.

31285772851313 is a deficient number, since it is larger than the sum of its proper divisors (1840403180527).

31285772851313 is a wasteful number, since it uses less digits than its factorization.

31285772851313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533407.

The product of its digits is 8467200, while the sum is 56.

The spelling of 31285772851313 in words is "thirty-one trillion, two hundred eighty-five billion, seven hundred seventy-two million, eight hundred fifty-one thousand, three hundred thirteen".