31371650081 has 8 divisors (see below), whose sum is σ = 32002798464. Its totient is φ = 30746782080.

The previous prime is 31371650059. The next prime is 31371650083. The reversal of 31371650081 is 18005617313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31371650081 is a prime.

It is a super-4 number, since 4×31371650081⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31371650083) 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 7 ways as a sum of consecutive naturals, for example, 1560005 + ... + 1579986.

It is an arithmetic number, because the mean of its divisors is an integer number (4000349808).

Almost surely, 2^31371650081 is an apocalyptic number.

It is an amenable number.

31371650081 is a deficient number, since it is larger than the sum of its proper divisors (631148383).

31371650081 is a wasteful number, since it uses less digits than its factorization.

31371650081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140191.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 31371650081 in words is "thirty-one billion, three hundred seventy-one million, six hundred fifty thousand, eighty-one".