31121006 has 8 divisors (see below), whose sum is σ = 53350320. Its totient is φ = 13337568.

The previous prime is 31120997. The next prime is 31121021. The reversal of 31121006 is 60012113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 2222929 = 31121006 / (3 + 1 + 1 + 2 + 1 + 0 + 0 + 6).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111451 + ... + 1111478.

It is an arithmetic number, because the mean of its divisors is an integer number (6668790).

Almost surely, 2^31121006 is an apocalyptic number.

31121006 is a deficient number, since it is larger than the sum of its proper divisors (22229314).

31121006 is a wasteful number, since it uses less digits than its factorization.

31121006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222938.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 31121006 is about 5578.6204387823. The cubic root of 31121006 is about 314.5462720994.

Adding to 31121006 its reverse (60012113), we get a palindrome (91133119).

The spelling of 31121006 in words is "thirty-one million, one hundred twenty-one thousand, six".