31321265064 has 32 divisors (see below), whose sum is σ = 78323328000. Its totient is φ = 10437732992.

The previous prime is 31321265057. The next prime is 31321265083. The reversal of 31321265064 is 46056212313.

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 7 ways as a sum of consecutive naturals, for example, 71784 + ... + 260375.

It is an arithmetic number, because the mean of its divisors is an integer number (2447604000).

Almost surely, 2^31321265064 is an apocalyptic number.

It is an amenable number.

31321265064 is an abundant number, since it is smaller than the sum of its proper divisors (47002062936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31321265064 is a wasteful number, since it uses less digits than its factorization.

31321265064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336097 (or 336093 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 31321265064 its reverse (46056212313), we get a palindrome (77377477377).

The spelling of 31321265064 in words is "thirty-one billion, three hundred twenty-one million, two hundred sixty-five thousand, sixty-four".