31133011 has 12 divisors (see below), whose sum is σ = 38529552. Its totient is φ = 24631776.

The previous prime is 31133009. The next prime is 31133017. The reversal of 31133011 is 11033113.

It is a happy number.

It is not a de Polignac number, because 31133011 - 2¹ = 31133009 is a prime.

It is a super-2 number, since 2×31133011² = 1938528747852242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31132982 and 31133000.

It is not an unprimeable number, because it can be changed into a prime (31133017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11976 + ... + 14341.

It is an arithmetic number, because the mean of its divisors is an integer number (3210796).

Almost surely, 2^31133011 is an apocalyptic number.

31133011 is a deficient number, since it is larger than the sum of its proper divisors (7396541).

31133011 is a wasteful number, since it uses less digits than its factorization.

31133011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26350 (or 26337 counting only the distinct ones).

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

The square root of 31133011 is about 5579.6963179012. The cubic root of 31133011 is about 314.5867125504.

Adding to 31133011 its reverse (11033113), we get a palindrome (42166124).

The spelling of 31133011 in words is "thirty-one million, one hundred thirty-three thousand, eleven".