31321067 has 4 divisors (see below), whose sum is σ = 32331456. Its totient is φ = 30310680.

The previous prime is 31321057. The next prime is 31321109. The reversal of 31321067 is 76012313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31321067 - 2¹⁴ = 31304683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505148 + ... + 505209.

It is an arithmetic number, because the mean of its divisors is an integer number (8082864).

Almost surely, 2^31321067 is an apocalyptic number.

31321067 is a deficient number, since it is larger than the sum of its proper divisors (1010389).

31321067 is a wasteful number, since it uses less digits than its factorization.

31321067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010388.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 31321067 is about 5596.5227597143. The cubic root of 31321067 is about 315.2188518608.

The spelling of 31321067 in words is "thirty-one million, three hundred twenty-one thousand, sixty-seven".