321961343 has 4 divisors (see below), whose sum is σ = 351230568. Its totient is φ = 292692120.

The previous prime is 321961307. The next prime is 321961361. The reversal of 321961343 is 343169123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321961343 - 2¹² = 321957247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321961303) 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, 14634596 + ... + 14634617.

It is an arithmetic number, because the mean of its divisors is an integer number (87807642).

Almost surely, 2^321961343 is an apocalyptic number.

321961343 is a deficient number, since it is larger than the sum of its proper divisors (29269225).

321961343 is a wasteful number, since it uses less digits than its factorization.

321961343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29269224.

The product of its digits is 11664, while the sum is 32.

The square root of 321961343 is about 17943.2812774030. The cubic root of 321961343 is about 685.3849705274.

The spelling of 321961343 in words is "three hundred twenty-one million, nine hundred sixty-one thousand, three hundred forty-three".