31313113003 has 4 divisors (see below), whose sum is σ = 31315566640. Its totient is φ = 31310659368.

The previous prime is 31313112979. The next prime is 31313113141. The reversal of 31313113003 is 30031131313.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31313113003 - 2²¹ = 31311015851 is a prime.

It is a super-2 number, since 2×31313113003² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313111003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1207575 + ... + 1233232.

It is an arithmetic number, because the mean of its divisors is an integer number (7828891660).

Almost surely, 2^31313113003 is an apocalyptic number.

31313113003 is a deficient number, since it is larger than the sum of its proper divisors (2453637).

31313113003 is a wasteful number, since it uses less digits than its factorization.

31313113003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453636.

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31313113003 its reverse (30031131313), we get a palindrome (61344244316).

The spelling of 31313113003 in words is "thirty-one billion, three hundred thirteen million, one hundred thirteen thousand, three".