31033130 has 8 divisors (see below), whose sum is σ = 55859652. Its totient is φ = 12413248.

The previous prime is 31033111. The next prime is 31033133. The reversal of 31033130 is 3133013.

It can be written as a sum of positive squares in 2 ways, for example, as 30880249 + 152881 = 5557^2 + 391^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31033133) 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 3 ways as a sum of consecutive naturals, for example, 1551647 + ... + 1551666.

Almost surely, 2^31033130 is an apocalyptic number.

31033130 is a deficient number, since it is larger than the sum of its proper divisors (24826522).

31033130 is a wasteful number, since it uses less digits than its factorization.

31033130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103320.

The product of its (nonzero) digits is 81, while the sum is 14.

The square root of 31033130 is about 5570.7387301865. The cubic root of 31033130 is about 314.2499328607.

Adding to 31033130 its reverse (3133013), we get a palindrome (34166143).

The spelling of 31033130 in words is "thirty-one million, thirty-three thousand, one hundred thirty".