31313321998 has 8 divisors (see below), whose sum is σ = 53679980592. Its totient is φ = 13419995136.

The previous prime is 31313321957. The next prime is 31313322017. The reversal of 31313321998 is 89912331313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118332915 + ... + 1118332942.

It is an arithmetic number, because the mean of its divisors is an integer number (6709997574).

Almost surely, 2^31313321998 is an apocalyptic number.

31313321998 is a deficient number, since it is larger than the sum of its proper divisors (22366658594).

31313321998 is a wasteful number, since it uses less digits than its factorization.

31313321998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236665866.

The product of its digits is 104976, while the sum is 43.

The spelling of 31313321998 in words is "thirty-one billion, three hundred thirteen million, three hundred twenty-one thousand, nine hundred ninety-eight".