33131536 has 15 divisors (see below), whose sum is σ = 64236991. Its totient is φ = 16554256.

The previous prime is 33131533. The next prime is 33131537. The reversal of 33131536 is 63513133.

The square root of 33131536 is 5756.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33131536.

It is not an unprimeable number, because it can be changed into a prime (33131533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22305 + ... + 23743.

Almost surely, 2^33131536 is an apocalyptic number.

33131536 is the 5756-th square number.

It is an amenable number.

33131536 is a deficient number, since it is larger than the sum of its proper divisors (31105455).

33131536 is an frugal number, since it uses more digits than its factorization.

33131536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886 (or 1441 counting only the distinct ones).

The product of its digits is 2430, while the sum is 25.

The cubic root of 33131536 is about 321.1790359384.

Multiplying 33131536 by its sum of digits (25), we get a square (828288400 = 28780²).

Adding to 33131536 its reverse (63513133), we get a palindrome (96644669).

The spelling of 33131536 in words is "thirty-three million, one hundred thirty-one thousand, five hundred thirty-six".