332768721 has 4 divisors (see below), whose sum is σ = 443691632. Its totient is φ = 221845812.

The previous prime is 332768719. The next prime is 332768731. The reversal of 332768721 is 127867233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 332768721 - 2¹ = 332768719 is a prime.

It is a super-2 number, since 2×332768721² = 221470043351951682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 332768721.

It is not an unprimeable number, because it can be changed into a prime (332768731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55461451 + ... + 55461456.

It is an arithmetic number, because the mean of its divisors is an integer number (110922908).

Almost surely, 2^332768721 is an apocalyptic number.

It is an amenable number.

332768721 is a deficient number, since it is larger than the sum of its proper divisors (110922911).

332768721 is a wasteful number, since it uses less digits than its factorization.

332768721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110922910.

The product of its digits is 84672, while the sum is 39.

The square root of 332768721 is about 18241.9494846357. The cubic root of 332768721 is about 692.9695727808.

The spelling of 332768721 in words is "three hundred thirty-two million, seven hundred sixty-eight thousand, seven hundred twenty-one".