31294223 has 2 divisors, whose sum is σ = 31294224. Its totient is φ = 31294222.

The previous prime is 31294217. The next prime is 31294243. The reversal of 31294223 is 32249213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31294223 - 2⁸ = 31293967 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31294192 and 31294201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31294213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15647111 + 15647112.

It is an arithmetic number, because the mean of its divisors is an integer number (15647112).

Almost surely, 2^31294223 is an apocalyptic number.

31294223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31294223 is an equidigital number, since it uses as much as digits as its factorization.

31294223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

The square root of 31294223 is about 5594.1239707393. The cubic root of 31294223 is about 315.1287724114.

The spelling of 31294223 in words is "thirty-one million, two hundred ninety-four thousand, two hundred twenty-three".