32216564 has 54 divisors (see below), whose sum is σ = 64018710. Its totient is φ = 14165760.

The previous prime is 32216519. The next prime is 32216567. The reversal of 32216564 is 46561223.

It can be written as a sum of positive squares in 3 ways, for example, as 13380964 + 18835600 = 3658^2 + 4340^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32216567) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1039229 + ... + 1039259.

Almost surely, 2^32216564 is an apocalyptic number.

32216564 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

32216564 is a deficient number, since it is larger than the sum of its proper divisors (31802146).

32216564 is a wasteful number, since it uses less digits than its factorization.

32216564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 79 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 32216564 is about 5675.9637067198. The cubic root of 32216564 is about 318.1947964626.

Multiplying 32216564 by its sum of digits (29), we get a square (934280356 = 30566²).

32216564 divided by its sum of digits (29) gives a square (1110916 = 1054²).

Adding to 32216564 its reverse (46561223), we get a palindrome (78777787).

The spelling of 32216564 in words is "thirty-two million, two hundred sixteen thousand, five hundred sixty-four".