31868421319 has 4 divisors (see below), whose sum is σ = 36421052944. Its totient is φ = 27315789696.

The previous prime is 31868421317. The next prime is 31868421331. The reversal of 31868421319 is 91312486813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91312486813 = 37 ⋅2467905049.

It is a cyclic number.

It is not a de Polignac number, because 31868421319 - 2¹ = 31868421317 is a prime.

It is a super-2 number, since 2×31868421319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31868421313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276315802 + ... + 2276315815.

It is an arithmetic number, because the mean of its divisors is an integer number (9105263236).

Almost surely, 2^31868421319 is an apocalyptic number.

31868421319 is a deficient number, since it is larger than the sum of its proper divisors (4552631625).

31868421319 is an equidigital number, since it uses as much as digits as its factorization.

31868421319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552631624.

The product of its digits is 248832, while the sum is 46.

The spelling of 31868421319 in words is "thirty-one billion, eight hundred sixty-eight million, four hundred twenty-one thousand, three hundred nineteen".