33231140 has 12 divisors (see below), whose sum is σ = 69785436. Its totient is φ = 13292448.

The previous prime is 33231139. The next prime is 33231169. The reversal of 33231140 is 4113233.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26460736 + 6770404 = 5144^2 + 2602^2 .

It is a super-2 number, since 2×33231140² = 2208617331399200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830759 + ... + 830798.

It is an arithmetic number, because the mean of its divisors is an integer number (5815453).

Almost surely, 2^33231140 is an apocalyptic number.

It is an amenable number.

33231140 is an abundant number, since it is smaller than the sum of its proper divisors (36554296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33231140 is a wasteful number, since it uses less digits than its factorization.

33231140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661566 (or 1661564 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 33231140 is about 5764.6456959643. The cubic root of 33231140 is about 321.5005695977.

Adding to 33231140 its reverse (4113233), we get a palindrome (37344373).

The spelling of 33231140 in words is "thirty-three million, two hundred thirty-one thousand, one hundred forty".