42035533253221 has 4 divisors (see below), whose sum is σ = 42035550672844. Its totient is φ = 42035515833600.

The previous prime is 42035533253167. The next prime is 42035533253281. The reversal of 42035533253221 is 12235233553024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1559076876900 + 40476456376321 = 1248630^2 + 6362111^2 .

It is a cyclic number.

It is not a de Polignac number, because 42035533253221 - 2¹⁹ = 42035532728933 is a prime.

It is a super-3 number, since 3×42035533253221³ (a number of 42 digits) contains 333 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 (42035533253281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4369020 + ... + 10156741.

It is an arithmetic number, because the mean of its divisors is an integer number (10508887668211).

Almost surely, 2^{42035533253221} is an apocalyptic number.

It is an amenable number.

42035533253221 is a deficient number, since it is larger than the sum of its proper divisors (17419623).

42035533253221 is a wasteful number, since it uses less digits than its factorization.

42035533253221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17419622.

The product of its (nonzero) digits is 648000, while the sum is 40.

The spelling of 42035533253221 in words is "forty-two trillion, thirty-five billion, five hundred thirty-three million, two hundred fifty-three thousand, two hundred twenty-one".