31100412 has 96 divisors (see below), whose sum is σ = 90961920. Its totient is φ = 8064000.

The previous prime is 31100411. The next prime is 31100449. The reversal of 31100412 is 21400113.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41037 + ... + 41787.

It is an arithmetic number, because the mean of its divisors is an integer number (947520).

Almost surely, 2^31100412 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 31100412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45480960).

31100412 is an abundant number, since it is smaller than the sum of its proper divisors (59861508).

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

31100412 is a wasteful number, since it uses less digits than its factorization.

31100412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 809 counting only the distinct ones).

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

The square root of 31100412 is about 5576.7743364780. The cubic root of 31100412 is about 314.4768742216.

Adding to 31100412 its reverse (21400113), we get a palindrome (52500525).

The spelling of 31100412 in words is "thirty-one million, one hundred thousand, four hundred twelve".