33220487 has 16 divisors (see below), whose sum is σ = 36042240. Its totient is φ = 30536352.

The previous prime is 33220483. The next prime is 33220507. The reversal of 33220487 is 78402233.

It is a cyclic number.

It is not a de Polignac number, because 33220487 - 2² = 33220483 is a prime.

It is a super-2 number, since 2×33220487² = 2207201513034338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87464 + ... + 87842.

It is an arithmetic number, because the mean of its divisors is an integer number (2252640).

Almost surely, 2^33220487 is an apocalyptic number.

33220487 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

33220487 is a deficient number, since it is larger than the sum of its proper divisors (2821753).

33220487 is a wasteful number, since it uses less digits than its factorization.

33220487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 33220487 is about 5763.7216275597. The cubic root of 33220487 is about 321.4662111454.

The spelling of 33220487 in words is "thirty-three million, two hundred twenty thousand, four hundred eighty-seven".