31112004 has 72 divisors (see below), whose sum is σ = 91223104. Its totient is φ = 8078400.

The previous prime is 31111999. The next prime is 31112009. The reversal of 31112004 is 40021113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31111999) and next prime (31112009).

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

It is not an unprimeable number, because it can be changed into a prime (31112009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8634 + ... + 11694.

Almost surely, 2^31112004 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 31112004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45611552).

31112004 is an abundant number, since it is smaller than the sum of its proper divisors (60111100).

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

31112004 is a wasteful number, since it uses less digits than its factorization.

31112004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097 (or 3084 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 31112004 is about 5577.8135501288. The cubic root of 31112004 is about 314.5159408327.

Adding to 31112004 its reverse (40021113), we get a palindrome (71133117).

It can be divided in two parts, 3111 and 2004, that added together give a palindrome (5115).

The spelling of 31112004 in words is "thirty-one million, one hundred twelve thousand, four".