31233130 has 16 divisors (see below), whose sum is σ = 56309544. Its totient is φ = 12473280.

The previous prime is 31233121. The next prime is 31233221. The reversal of 31233130 is 3133213.

It can be written as a sum of positive squares in 4 ways, for example, as 30481441 + 751689 = 5521^2 + 867^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5200 + ... + 9460.

Almost surely, 2^31233130 is an apocalyptic number.

31233130 is a deficient number, since it is larger than the sum of its proper divisors (25076414).

31233130 is a wasteful number, since it uses less digits than its factorization.

31233130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 31233130 is about 5588.6608413823. The cubic root of 31233130 is about 314.9235726230.

Adding to 31233130 its reverse (3133213), we get a palindrome (34366343).

The spelling of 31233130 in words is "thirty-one million, two hundred thirty-three thousand, one hundred thirty".