33220400145 has 16 divisors (see below), whose sum is σ = 56279266560. Its totient is φ = 16675337984.

The previous prime is 33220400123. The next prime is 33220400149. The reversal of 33220400145 is 54100402233.

It is a cyclic number.

It is not a de Polignac number, because 33220400145 - 2¹¹ = 33220398097 is a prime.

It is a super-2 number, since 2×33220400145² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33220400149) 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, 65137785 + ... + 65138294.

It is an arithmetic number, because the mean of its divisors is an integer number (3517454160).

Almost surely, 2^33220400145 is an apocalyptic number.

It is an amenable number.

33220400145 is a deficient number, since it is larger than the sum of its proper divisors (23058866415).

33220400145 is a wasteful number, since it uses less digits than its factorization.

33220400145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130276104.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 33220400145 its reverse (54100402233), we get a palindrome (87320802378).

The spelling of 33220400145 in words is "thirty-three billion, two hundred twenty million, four hundred thousand, one hundred forty-five".