35809221 has 16 divisors (see below), whose sum is σ = 54873728. Its totient is φ = 20347200.

The previous prime is 35809219. The next prime is 35809223. The reversal of 35809221 is 12290853.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (35809219) and next prime (35809223).

It is not a de Polignac number, because 35809221 - 2¹ = 35809219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35809223) 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, 910 + ... + 8511.

It is an arithmetic number, because the mean of its divisors is an integer number (3429608).

Almost surely, 2^35809221 is an apocalyptic number.

It is an amenable number.

35809221 is a deficient number, since it is larger than the sum of its proper divisors (19064507).

35809221 is a wasteful number, since it uses less digits than its factorization.

35809221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9612.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 35809221 is about 5984.0806311413. The cubic root of 35809221 is about 329.6084152274.

The spelling of 35809221 in words is "thirty-five million, eight hundred nine thousand, two hundred twenty-one".