332163721 has 4 divisors (see below), whose sum is σ = 332778244. Its totient is φ = 331549200.

The previous prime is 332163679. The next prime is 332163751. The reversal of 332163721 is 127361233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127361233 = 257 ⋅495569.

It can be written as a sum of positive squares in 2 ways, for example, as 208398096 + 123765625 = 14436^2 + 11125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-332163721 is a prime.

It is a super-2 number, since 2×332163721² = 220665475097131682, 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 332163721.

It is not an unprimeable number, because it can be changed into a prime (332163751) 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, 306450 + ... + 307531.

It is an arithmetic number, because the mean of its divisors is an integer number (83194561).

Almost surely, 2^332163721 is an apocalyptic number.

It is an amenable number.

332163721 is a deficient number, since it is larger than the sum of its proper divisors (614523).

332163721 is an equidigital number, since it uses as much as digits as its factorization.

332163721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614522.

The product of its digits is 4536, while the sum is 28.

The square root of 332163721 is about 18225.3592831527. The cubic root of 332163721 is about 692.5493600860.

The spelling of 332163721 in words is "three hundred thirty-two million, one hundred sixty-three thousand, seven hundred twenty-one".