31115605210445 has 32 divisors (see below), whose sum is σ = 43826764006656. Its totient is φ = 20759464166400.

The previous prime is 31115605210427. The next prime is 31115605210453. The reversal of 31115605210445 is 54401250651113.

It is not a de Polignac number, because 31115605210445 - 2¹⁰ = 31115605209421 is a prime.

It is a super-2 number, since 2×31115605210445² (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 = 31115605210399 and 31115605210408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132764165 + ... + 132998325.

It is an arithmetic number, because the mean of its divisors is an integer number (1369586375208).

Almost surely, 2^{31115605210445} is an apocalyptic number.

31115605210445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31115605210445 is a deficient number, since it is larger than the sum of its proper divisors (12711158796211).

31115605210445 is a wasteful number, since it uses less digits than its factorization.

31115605210445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336821.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 31115605210445 its reverse (54401250651113), we get a palindrome (85516855861558).

The spelling of 31115605210445 in words is "thirty-one trillion, one hundred fifteen billion, six hundred five million, two hundred ten thousand, four hundred forty-five".