31222427 has 2 divisors, whose sum is σ = 31222428. Its totient is φ = 31222426.

The previous prime is 31222393. The next prime is 31222439. The reversal of 31222427 is 72422213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31222427 - 2¹⁰ = 31221403 is a prime.

It is not a weakly prime, because it can be changed into another prime (31222447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611213 + 15611214.

It is an arithmetic number, because the mean of its divisors is an integer number (15611214).

Almost surely, 2^31222427 is an apocalyptic number.

31222427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222427 is an equidigital number, since it uses as much as digits as its factorization.

31222427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 23.

The square root of 31222427 is about 5587.7031954104. The cubic root of 31222427 is about 314.8875957390.

The spelling of 31222427 in words is "thirty-one million, two hundred twenty-two thousand, four hundred twenty-seven".