31111104 has 56 divisors (see below), whose sum is σ = 84986368. Its totient is φ = 10033920.

The previous prime is 31111103. The next prime is 31111121. The reversal of 31111104 is 40111113.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31111104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111103) 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, 3339 + ... + 8565.

Almost surely, 2^31111104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31111104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42493184).

31111104 is an abundant number, since it is smaller than the sum of its proper divisors (53875264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111104 is a wasteful number, since it uses less digits than its factorization.

31111104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273 (or 5263 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 31111104 is about 5577.7328727719. The cubic root of 31111104 is about 314.5129080582.

Adding to 31111104 its reverse (40111113), we get a palindrome (71222217).

Subtracting 31111104 from its reverse (40111113), we obtain a palindrome (9000009).

The spelling of 31111104 in words is "thirty-one million, one hundred eleven thousand, one hundred four".