31204112 has 40 divisors (see below), whose sum is σ = 64783800. Its totient is φ = 14508032.

The previous prime is 31204109. The next prime is 31204127. The reversal of 31204112 is 21140213.

It can be written as a sum of positive squares in 4 ways, for example, as 8317456 + 22886656 = 2884^2 + 4784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23564 + ... + 24852.

It is an arithmetic number, because the mean of its divisors is an integer number (1619595).

Almost surely, 2^31204112 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 31204112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32391900).

31204112 is an abundant number, since it is smaller than the sum of its proper divisors (33579688).

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

31204112 is a wasteful number, since it uses less digits than its factorization.

31204112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1397 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31204112 is about 5586.0640884258. The cubic root of 31204112 is about 314.8260129292.

Adding to 31204112 its reverse (21140213), we get a palindrome (52344325).

The spelling of 31204112 in words is "thirty-one million, two hundred four thousand, one hundred twelve".