31313011 has 8 divisors (see below), whose sum is σ = 32943600. Its totient is φ = 29719200.

The previous prime is 31312999. The next prime is 31313017. The reversal of 31313011 is 11031313.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-31313011 is a prime.

It is a super-2 number, since 2×31313011² = 1961009315772242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312982 and 31313000.

It is not an unprimeable number, because it can be changed into a prime (31313017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7440 + ... + 10861.

It is an arithmetic number, because the mean of its divisors is an integer number (4117950).

Almost surely, 2^31313011 is an apocalyptic number.

31313011 is a deficient number, since it is larger than the sum of its proper divisors (1630589).

31313011 is a wasteful number, since it uses less digits than its factorization.

31313011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18389.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 31313011 is about 5595.8029808062. The cubic root of 31313011 is about 315.1918240372.

Adding to 31313011 its reverse (11031313), we get a palindrome (42344324).

The spelling of 31313011 in words is "thirty-one million, three hundred thirteen thousand, eleven".