31121044 has 6 divisors (see below), whose sum is σ = 54461834. Its totient is φ = 15560520.

The previous prime is 31121039. The next prime is 31121059. The reversal of 31121044 is 44012113.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 9610000 = 4638^2 + 3100^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3890127 + ... + 3890134.

Almost surely, 2^31121044 is an apocalyptic number.

It is an amenable number.

31121044 is a deficient number, since it is larger than the sum of its proper divisors (23340790).

31121044 is a wasteful number, since it uses less digits than its factorization.

31121044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780265 (or 7780263 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31121044 is about 5578.6238446413. The cubic root of 31121044 is about 314.5464001239.

Adding to 31121044 its reverse (44012113), we get a palindrome (75133157).

The spelling of 31121044 in words is "thirty-one million, one hundred twenty-one thousand, forty-four".