31324315506 has 32 divisors (see below), whose sum is σ = 69798094848. Its totient is φ = 9290253840.

The previous prime is 31324315487. The next prime is 31324315559. The reversal of 31324315506 is 60551342313.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5045950 + ... + 5052153.

It is an arithmetic number, because the mean of its divisors is an integer number (2181190464).

Almost surely, 2^31324315506 is an apocalyptic number.

31324315506 is an abundant number, since it is smaller than the sum of its proper divisors (38473779342).

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

31324315506 is a wasteful number, since it uses less digits than its factorization.

31324315506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10098166.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 31324315506 its reverse (60551342313), we get a palindrome (91875657819).

The spelling of 31324315506 in words is "thirty-one billion, three hundred twenty-four million, three hundred fifteen thousand, five hundred six".