31421442223 has 4 divisors (see below), whose sum is σ = 33075202360. Its totient is φ = 29767682088.

The previous prime is 31421442211. The next prime is 31421442259. The reversal of 31421442223 is 32224412413.

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 31421442223 - 2⁵ = 31421442191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31421442191 and 31421442200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421442263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826880040 + ... + 826880077.

It is an arithmetic number, because the mean of its divisors is an integer number (8268800590).

Almost surely, 2^31421442223 is an apocalyptic number.

31421442223 is a deficient number, since it is larger than the sum of its proper divisors (1653760137).

31421442223 is a wasteful number, since it uses less digits than its factorization.

31421442223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653760136.

The product of its digits is 9216, while the sum is 28.

Adding to 31421442223 its reverse (32224412413), we get a palindrome (63645854636).

The spelling of 31421442223 in words is "thirty-one billion, four hundred twenty-one million, four hundred forty-two thousand, two hundred twenty-three".