33545555223221 has 16 divisors (see below), whose sum is σ = 34090690233600. Its totient is φ = 33005141359488.

The previous prime is 33545555223199. The next prime is 33545555223233. The reversal of 33545555223221 is 12232255554533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33545555223221 is a prime.

It is a super-2 number, since 2×33545555223221² (a number of 28 digits) 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 (33545555223721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16956185 + ... + 18830913.

It is an arithmetic number, because the mean of its divisors is an integer number (2130668139600).

Almost surely, 2^{33545555223221} is an apocalyptic number.

It is an amenable number.

33545555223221 is a deficient number, since it is larger than the sum of its proper divisors (545135010379).

33545555223221 is a wasteful number, since it uses less digits than its factorization.

33545555223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875988.

The product of its digits is 5400000, while the sum is 47.

The spelling of 33545555223221 in words is "thirty-three trillion, five hundred forty-five billion, five hundred fifty-five million, two hundred twenty-three thousand, two hundred twenty-one".