31422223 has 8 divisors (see below), whose sum is σ = 36344448. Its totient is φ = 26608344.

The previous prime is 31422203. The next prime is 31422227. The reversal of 31422223 is 32222413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31422223 - 2⁵ = 31422191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31422223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26461 + ... + 27622.

It is an arithmetic number, because the mean of its divisors is an integer number (4543056).

Almost surely, 2^31422223 is an apocalyptic number.

31422223 is a deficient number, since it is larger than the sum of its proper divisors (4922225).

31422223 is an equidigital number, since it uses as much as digits as its factorization.

31422223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54173.

The product of its digits is 576, while the sum is 19.

The square root of 31422223 is about 5605.5528719298. The cubic root of 31422223 is about 315.5578357625.

Adding to 31422223 its reverse (32222413), we get a palindrome (63644636).

The spelling of 31422223 in words is "thirty-one million, four hundred twenty-two thousand, two hundred twenty-three".