31313214550 has 24 divisors (see below), whose sum is σ = 59229747000. Its totient is φ = 12312991680.

The previous prime is 31313214539. The next prime is 31313214587. The reversal of 31313214550 is 5541231313.

It is a happy number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 5304375 + ... + 5310274.

It is an arithmetic number, because the mean of its divisors is an integer number (2467906125).

Almost surely, 2^31313214550 is an apocalyptic number.

31313214550 is a deficient number, since it is larger than the sum of its proper divisors (27916532450).

31313214550 is a wasteful number, since it uses less digits than its factorization.

31313214550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10614720 (or 10614715 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 31313214550 its reverse (5541231313), we get a palindrome (36854445863).

The spelling of 31313214550 in words is "thirty-one billion, three hundred thirteen million, two hundred fourteen thousand, five hundred fifty".