31321535012006 has 4 divisors (see below), whose sum is σ = 46982302518012. Its totient is φ = 15660767506002.

The previous prime is 31321535011979. The next prime is 31321535012057. The reversal of 31321535012006 is 60021053512313.

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

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, 7830383753000 + ... + 7830383753003.

It is an arithmetic number, because the mean of its divisors is an integer number (11745575629503).

Almost surely, 2^{31321535012006} is an apocalyptic number.

31321535012006 is a deficient number, since it is larger than the sum of its proper divisors (15660767506006).

31321535012006 is a wasteful number, since it uses less digits than its factorization.

31321535012006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15660767506005.

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 31321535012006 its reverse (60021053512313), we get a palindrome (91342588524319).

The spelling of 31321535012006 in words is "thirty-one trillion, three hundred twenty-one billion, five hundred thirty-five million, twelve thousand, six".