31211104 has 24 divisors (see below), whose sum is σ = 61771248. Its totient is φ = 15523200.

The previous prime is 31211087. The next prime is 31211107. The reversal of 31211104 is 40111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3829 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (2573802).

Almost surely, 2^31211104 is an apocalyptic number.

It is an amenable number.

31211104 is a deficient number, since it is larger than the sum of its proper divisors (30560144).

31211104 is a wasteful number, since it uses less digits than its factorization.

31211104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158 (or 5150 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 31211104 is about 5586.6898965309. The cubic root of 31211104 is about 314.8495258462.

Adding to 31211104 its reverse (40111213), we get a palindrome (71322317).

It can be divided in two parts, 3121 and 1104, that added together give a square (4225 = 65²).

The spelling of 31211104 in words is "thirty-one million, two hundred eleven thousand, one hundred four".