35555221 has 4 divisors (see below), whose sum is σ = 38290252. Its totient is φ = 32820192.

The previous prime is 35555207. The next prime is 35555231. The reversal of 35555221 is 12255553.

35555221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12255553 = 769 ⋅15937.

It can be written as a sum of positive squares in 2 ways, for example, as 22667121 + 12888100 = 4761^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 35555221 - 2¹¹ = 35553173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 35555221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35555231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367496 + ... + 1367521.

It is an arithmetic number, because the mean of its divisors is an integer number (9572563).

Almost surely, 2^35555221 is an apocalyptic number.

It is an amenable number.

35555221 is a deficient number, since it is larger than the sum of its proper divisors (2735031).

35555221 is a wasteful number, since it uses less digits than its factorization.

35555221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735030.

The product of its digits is 7500, while the sum is 28.

The square root of 35555221 is about 5962.8198865973. The cubic root of 35555221 is about 328.8272452180.

The spelling of 35555221 in words is "thirty-five million, five hundred fifty-five thousand, two hundred twenty-one".