31641343 has 4 divisors (see below), whose sum is σ = 32022648. Its totient is φ = 31260040.

The previous prime is 31641329. The next prime is 31641367. The reversal of 31641343 is 34314613.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34314613 = 31 ⋅1106923.

It is a cyclic number.

It is not a de Polignac number, because 31641343 - 2⁹ = 31640831 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 (31641373) 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, 190528 + ... + 190693.

It is an arithmetic number, because the mean of its divisors is an integer number (8005662).

Almost surely, 2^31641343 is an apocalyptic number.

31641343 is a deficient number, since it is larger than the sum of its proper divisors (381305).

31641343 is an equidigital number, since it uses as much as digits as its factorization.

31641343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381304.

The product of its digits is 2592, while the sum is 25.

The square root of 31641343 is about 5625.0638218602. The cubic root of 31641343 is about 316.2896419033.

Adding to 31641343 its reverse (34314613), we get a palindrome (65955956).

The spelling of 31641343 in words is "thirty-one million, six hundred forty-one thousand, three hundred forty-three".