32164221 has 16 divisors (see below), whose sum is σ = 46090944. Its totient is φ = 19878144.

The previous prime is 32164201. The next prime is 32164229. The reversal of 32164221 is 12246123.

It is not a de Polignac number, because 32164221 - 2¹⁵ = 32131453 is a prime.

It is a super-2 number, since 2×32164221² = 2069074225073682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32164229) 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, 1290 + ... + 8123.

It is an arithmetic number, because the mean of its divisors is an integer number (2880684).

Almost surely, 2^32164221 is an apocalyptic number.

It is an amenable number.

32164221 is a deficient number, since it is larger than the sum of its proper divisors (13926723).

32164221 is a wasteful number, since it uses less digits than its factorization.

32164221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9500.

The product of its digits is 576, while the sum is 21.

The square root of 32164221 is about 5671.3508972731. The cubic root of 32164221 is about 318.0223768914.

It can be divided in two parts, 32164 and 221, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 32164221 in words is "thirty-two million, one hundred sixty-four thousand, two hundred twenty-one".