31349206417 has 4 divisors (see below), whose sum is σ = 31449363940. Its totient is φ = 31249048896.

The previous prime is 31349206411. The next prime is 31349206463. The reversal of 31349206417 is 71460294313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71460294313 = 57713 ⋅1238201.

It can be written as a sum of positive squares in 2 ways, for example, as 3192702016 + 28156504401 = 56504^2 + 167799^2 .

It is a cyclic number.

It is not a de Polignac number, because 31349206417 - 2¹⁹ = 31348682129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31349206417.

It is not an unprimeable number, because it can be changed into a prime (31349206411) 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, 50078292 + ... + 50078917.

It is an arithmetic number, because the mean of its divisors is an integer number (7862340985).

Almost surely, 2^31349206417 is an apocalyptic number.

It is an amenable number.

31349206417 is a deficient number, since it is larger than the sum of its proper divisors (100157523).

31349206417 is a wasteful number, since it uses less digits than its factorization.

31349206417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100157522.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 31349206417 in words is "thirty-one billion, three hundred forty-nine million, two hundred six thousand, four hundred seventeen".