42313321 has 4 divisors (see below), whose sum is σ = 43007044. Its totient is φ = 41619600.

The previous prime is 42313319. The next prime is 42313331. The reversal of 42313321 is 12331324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21483225 + 20830096 = 4635^2 + 4564^2 .

It is a cyclic number.

It is not a de Polignac number, because 42313321 - 2¹ = 42313319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42313331) 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, 346770 + ... + 346891.

It is an arithmetic number, because the mean of its divisors is an integer number (10751761).

Almost surely, 2^42313321 is an apocalyptic number.

It is an amenable number.

42313321 is a deficient number, since it is larger than the sum of its proper divisors (693723).

42313321 is an equidigital number, since it uses as much as digits as its factorization.

42313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693722.

The product of its digits is 432, while the sum is 19.

The square root of 42313321 is about 6504.8690225092. The cubic root of 42313321 is about 348.4648986519.

Adding to 42313321 its reverse (12331324), we get a palindrome (54644645).

The spelling of 42313321 in words is "forty-two million, three hundred thirteen thousand, three hundred twenty-one".