32288136721 has 3 divisors (see below), whose sum is σ = 32288316411. Its totient is φ = 32287957032.

The previous prime is 32288136697. The next prime is 32288136821. The reversal of 32288136721 is 12763188223.

The square root of 32288136721 is 179689.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 23482191121 + 8805945600 = 153239^2 + 93840^2 .

It is not a de Polignac number, because 32288136721 - 2¹¹ = 32288134673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32288136121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 89845 + ... + 269533.

It is an arithmetic number, because the mean of its divisors is an integer number (10762772137).

Almost surely, 2^32288136721 is an apocalyptic number.

32288136721 is the 179689-th square number.

32288136721 is the 89845-th centered octagonal number.

It is an amenable number.

32288136721 is a deficient number, since it is larger than the sum of its proper divisors (179690).

32288136721 is an frugal number, since it uses more digits than its factorization.

32288136721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359378 (or 179689 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The spelling of 32288136721 in words is "thirty-two billion, two hundred eighty-eight million, one hundred thirty-six thousand, seven hundred twenty-one".