32161506 has 48 divisors (see below), whose sum is σ = 71237376. Its totient is φ = 9622368.

The previous prime is 32161499. The next prime is 32161517. The reversal of 32161506 is 60516123.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144111 + ... + 144333.

It is an arithmetic number, because the mean of its divisors is an integer number (1484112).

Almost surely, 2^32161506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32161506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35618688).

32161506 is an abundant number, since it is smaller than the sum of its proper divisors (39075870).

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

32161506 is a wasteful number, since it uses less digits than its factorization.

32161506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 32161506 is about 5671.1115312609. Note that the first 3 decimals coincide. The cubic root of 32161506 is about 318.0134284903.

Adding to 32161506 its reverse (60516123), we get a palindrome (92677629).

The spelling of 32161506 in words is "thirty-two million, one hundred sixty-one thousand, five hundred six".