31133001 has 32 divisors (see below), whose sum is σ = 46915200. Its totient is φ = 18298368.

The previous prime is 31132999. The next prime is 31133009. The reversal of 31133001 is 10033113.

It is not a de Polignac number, because 31133001 - 2¹ = 31132999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31133009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349765 + ... + 349853.

It is an arithmetic number, because the mean of its divisors is an integer number (1466100).

Almost surely, 2^31133001 is an apocalyptic number.

It is an amenable number.

31133001 is a deficient number, since it is larger than the sum of its proper divisors (15782199).

31133001 is an equidigital number, since it uses as much as digits as its factorization.

31133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 31133001 is about 5579.6954217950. The cubic root of 31133001 is about 314.5866788684.

Adding to 31133001 its reverse (10033113), we get a palindrome (41166114).

The spelling of 31133001 in words is "thirty-one million, one hundred thirty-three thousand, one".