31313421303 has 64 divisors (see below), whose sum is σ = 45895973760. Its totient is φ = 18912051200.

The previous prime is 31313421289. The next prime is 31313421319. The reversal of 31313421303 is 30312431313.

It is a happy number.

It is not a de Polignac number, because 31313421303 - 2⁴ = 31313421287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313421383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80497033 + ... + 80497421.

It is an arithmetic number, because the mean of its divisors is an integer number (717124590).

Almost surely, 2^31313421303 is an apocalyptic number.

31313421303 is a deficient number, since it is larger than the sum of its proper divisors (14582552457).

31313421303 is a wasteful number, since it uses less digits than its factorization.

31313421303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31313421303 its reverse (30312431313), we get a palindrome (61625852616).

The spelling of 31313421303 in words is "thirty-one billion, three hundred thirteen million, four hundred twenty-one thousand, three hundred three".