31434321 has 4 divisors (see below), whose sum is σ = 41912432. Its totient is φ = 20956212.

The previous prime is 31434287. The next prime is 31434329. The reversal of 31434321 is 12343413.

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 31434321 - 2⁶ = 31434257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31434329) 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, 5239051 + ... + 5239056.

It is an arithmetic number, because the mean of its divisors is an integer number (10478108).

Almost surely, 2^31434321 is an apocalyptic number.

It is an amenable number.

31434321 is a deficient number, since it is larger than the sum of its proper divisors (10478111).

31434321 is a wasteful number, since it uses less digits than its factorization.

31434321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10478110.

The product of its digits is 864, while the sum is 21.

The square root of 31434321 is about 5606.6318766261. The cubic root of 31434321 is about 315.5983286419.

Adding to 31434321 its reverse (12343413), we get a palindrome (43777734).

The spelling of 31434321 in words is "thirty-one million, four hundred thirty-four thousand, three hundred twenty-one".