31042223 has 8 divisors (see below), whose sum is σ = 31951920. Its totient is φ = 30136320.

The previous prime is 31042217. The next prime is 31042241. The reversal of 31042223 is 32224013.

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

It is a cyclic number.

It is not a de Polignac number, because 31042223 - 2⁶ = 31042159 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 (31042283) 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, 27908 + ... + 28998.

It is an arithmetic number, because the mean of its divisors is an integer number (3993990).

Almost surely, 2^31042223 is an apocalyptic number.

31042223 is a deficient number, since it is larger than the sum of its proper divisors (909697).

31042223 is a wasteful number, since it uses less digits than its factorization.

31042223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31042223 is about 5571.5548099251. The cubic root of 31042223 is about 314.2806225956.

Adding to 31042223 its reverse (32224013), we get a palindrome (63266236).

The spelling of 31042223 in words is "thirty-one million, forty-two thousand, two hundred twenty-three".