31109823901 has 8 divisors (see below), whose sum is σ = 33504257024. Its totient is φ = 28715586480.

The previous prime is 31109823859. The next prime is 31109823919. The reversal of 31109823901 is 10932890113.

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-31109823901 is a prime.

It is a super-2 number, since 2×31109823901² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31109823001) 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, 610516 + ... + 659506.

It is an arithmetic number, because the mean of its divisors is an integer number (4188032128).

Almost surely, 2^31109823901 is an apocalyptic number.

It is an amenable number.

31109823901 is a deficient number, since it is larger than the sum of its proper divisors (2394433123).

31109823901 is a wasteful number, since it uses less digits than its factorization.

31109823901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97851.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 31109823901 in words is "thirty-one billion, one hundred nine million, eight hundred twenty-three thousand, nine hundred one".