33132540 has 48 divisors (see below), whose sum is σ = 106025472. Its totient is φ = 7573056.

The previous prime is 33132511. The next prime is 33132553. The reversal of 33132540 is 4523133.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39024 + ... + 39863.

It is an arithmetic number, because the mean of its divisors is an integer number (2208864).

Almost surely, 2^33132540 is an apocalyptic number.

33132540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33132540 is an abundant number, since it is smaller than the sum of its proper divisors (72892932).

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

33132540 is a wasteful number, since it uses less digits than its factorization.

33132540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78906 (or 78904 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 33132540 is about 5756.0872126819. The cubic root of 33132540 is about 321.1822801838.

Adding to 33132540 its reverse (4523133), we get a palindrome (37655673).

The spelling of 33132540 in words is "thirty-three million, one hundred thirty-two thousand, five hundred forty".