31127690881 has 8 divisors (see below), whose sum is σ = 35608751360. Its totient is φ = 26655192288.

The previous prime is 31127690833. The next prime is 31127690921. The reversal of 31127690881 is 18809672113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31127690881 - 2¹¹ = 31127688833 is a prime.

It is a super-2 number, since 2×31127690881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31127690801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2132676 + ... + 2147221.

It is an arithmetic number, because the mean of its divisors is an integer number (4451093920).

Almost surely, 2^31127690881 is an apocalyptic number.

It is an amenable number.

31127690881 is a deficient number, since it is larger than the sum of its proper divisors (4481060479).

31127690881 is a wasteful number, since it uses less digits than its factorization.

31127690881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280943.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 31127690881 in words is "thirty-one billion, one hundred twenty-seven million, six hundred ninety thousand, eight hundred eighty-one".