31419397193 has 4 divisors (see below), whose sum is σ = 31619520900. Its totient is φ = 31219273488.

The previous prime is 31419397157. The next prime is 31419397199. The reversal of 31419397193 is 39179391413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39179391413 = 29 ⋅1351013497.

It can be written as a sum of positive squares in 2 ways, for example, as 15110063929 + 16309333264 = 122923^2 + 127708^2 .

It is a cyclic number.

It is not a de Polignac number, because 31419397193 - 2¹⁸ = 31419135049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31419397199) 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 3 ways as a sum of consecutive naturals, for example, 100061618 + ... + 100061931.

It is an arithmetic number, because the mean of its divisors is an integer number (7904880225).

Almost surely, 2^31419397193 is an apocalyptic number.

It is an amenable number.

31419397193 is a deficient number, since it is larger than the sum of its proper divisors (200123707).

31419397193 is a wasteful number, since it uses less digits than its factorization.

31419397193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200123706.

The product of its digits is 551124, while the sum is 50.

The spelling of 31419397193 in words is "thirty-one billion, four hundred nineteen million, three hundred ninety-seven thousand, one hundred ninety-three".