33525402021 has 12 divisors (see below), whose sum is σ = 48445483372. Its totient is φ = 22341082176.

The previous prime is 33525401989. The next prime is 33525402049. The reversal of 33525402021 is 12020452533.

It is a happy number.

33525402021 is a `hidden beast` number, since 33 + 52 + 540 + 20 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32822568900 + 702833121 = 181170^2 + 26511^2 .

It is not a de Polignac number, because 33525402021 - 2⁵ = 33525401989 is a prime.

It is a super-2 number, since 2×33525402021² (a number of 22 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 (33525402061) 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 11 ways as a sum of consecutive naturals, for example, 742336 + ... + 786201.

Almost surely, 2^33525402021 is an apocalyptic number.

It is an amenable number.

33525402021 is a deficient number, since it is larger than the sum of its proper divisors (14920081351).

33525402021 is a wasteful number, since it uses less digits than its factorization.

33525402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530980 (or 1530977 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 33525402021 its reverse (12020452533), we get a palindrome (45545854554).

The spelling of 33525402021 in words is "thirty-three billion, five hundred twenty-five million, four hundred two thousand, twenty-one".