31130033 has 6 divisors (see below), whose sum is σ = 34217442. Its totient is φ = 28299920.

The previous prime is 31129991. The next prime is 31130039. The reversal of 31130033 is 33003113.

It can be written as a sum of positive squares in only one way, i.e., 19651489 + 11478544 = 4433^2 + 3388^2 .

It is not a de Polignac number, because 31130033 - 2¹⁰ = 31129009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31130039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128516 + ... + 128757.

It is an arithmetic number, because the mean of its divisors is an integer number (5702907).

Almost surely, 2^31130033 is an apocalyptic number.

It is an amenable number.

31130033 is a deficient number, since it is larger than the sum of its proper divisors (3087409).

31130033 is a wasteful number, since it uses less digits than its factorization.

31130033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257295 (or 257284 counting only the distinct ones).

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

The square root of 31130033 is about 5579.4294511177. The cubic root of 31130033 is about 314.5766817281.

Adding to 31130033 its reverse (33003113), we get a palindrome (64133146).

Subtracting 31130033 from its reverse (33003113), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 31130033 in words is "thirty-one million, one hundred thirty thousand, thirty-three".