32121616 has 40 divisors (see below), whose sum is σ = 65424384. Its totient is φ = 15248640.

The previous prime is 32121577. The next prime is 32121623. The reversal of 32121616 is 61612123.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70060 + ... + 70516.

Almost surely, 2^32121616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32121616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32712192).

32121616 is an abundant number, since it is smaller than the sum of its proper divisors (33302768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

32121616 is a wasteful number, since it uses less digits than its factorization.

32121616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 673 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 32121616 is about 5667.5934928327. The cubic root of 32121616 is about 317.8818964665.

Adding to 32121616 its reverse (61612123), we get a palindrome (93733739).

The spelling of 32121616 in words is "thirty-two million, one hundred twenty-one thousand, six hundred sixteen".