31100004 has 96 divisors (see below), whose sum is σ = 92010240. Its totient is φ = 8999424.

The previous prime is 31099969. The next prime is 31100011. The reversal of 31100004 is 40000113.

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 23217 + ... + 24519.

It is an arithmetic number, because the mean of its divisors is an integer number (958440).

Almost surely, 2^31100004 is an apocalyptic number.

31100004 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31100004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46005120).

31100004 is an abundant number, since it is smaller than the sum of its proper divisors (60910236).

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

31100004 is a wasteful number, since it uses less digits than its factorization.

31100004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 31100004 is about 5576.7377560721. The cubic root of 31100004 is about 314.4754990295.

Adding to 31100004 its reverse (40000113), we get a palindrome (71100117).

The spelling of 31100004 in words is "thirty-one million, one hundred thousand, four".