31600028858855 has 4 divisors (see below), whose sum is σ = 37920034630632. Its totient is φ = 25280023087080.

The previous prime is 31600028858833. The next prime is 31600028858939. The reversal of 31600028858855 is 55885882000613.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-31600028858855 is a prime.

It is a super-2 number, since 2×31600028858855² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31600028858794 and 31600028858803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3160002885881 + ... + 3160002885890.

It is an arithmetic number, because the mean of its divisors is an integer number (9480008657658).

Almost surely, 2^{31600028858855} is an apocalyptic number.

31600028858855 is a deficient number, since it is larger than the sum of its proper divisors (6320005771777).

31600028858855 is an equidigital number, since it uses as much as digits as its factorization.

31600028858855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6320005771776.

The product of its (nonzero) digits is 18432000, while the sum is 59.

The spelling of 31600028858855 in words is "thirty-one trillion, six hundred billion, twenty-eight million, eight hundred fifty-eight thousand, eight hundred fifty-five".