31290040191 has 8 divisors (see below), whose sum is σ = 41734107904. Its totient is φ = 20852999640.

The previous prime is 31290040181. The next prime is 31290040207. The reversal of 31290040191 is 19104009213.

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

It is not a de Polignac number, because 31290040191 - 2¹³ = 31290031999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31290040141) 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, 1746391 + ... + 1764216.

It is an arithmetic number, because the mean of its divisors is an integer number (5216763488).

Almost surely, 2^31290040191 is an apocalyptic number.

31290040191 is a deficient number, since it is larger than the sum of its proper divisors (10444067713).

31290040191 is a wasteful number, since it uses less digits than its factorization.

31290040191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513581.

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 31290040191 in words is "thirty-one billion, two hundred ninety million, forty thousand, one hundred ninety-one".