31321010 has 16 divisors (see below), whose sum is σ = 64431936. Its totient is φ = 10738608.

The previous prime is 31320997. The next prime is 31321013. The reversal of 31321010 is 1012313.

It is a junction number, because it is equal to n+sod(n) for n = 31320982 and 31321000.

It is not an unprimeable number, because it can be changed into a prime (31321013) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 223652 + ... + 223791.

It is an arithmetic number, because the mean of its divisors is an integer number (4026996).

Almost surely, 2^31321010 is an apocalyptic number.

31321010 is an abundant number, since it is smaller than the sum of its proper divisors (33110926).

31321010 is a wasteful number, since it uses less digits than its factorization.

31321010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447457.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 31321010 is about 5596.5176672642. The cubic root of 31321010 is about 315.2186606425.

Adding to 31321010 its reverse (1012313), we get a palindrome (32333323).

The spelling of 31321010 in words is "thirty-one million, three hundred twenty-one thousand, ten".