31486229 has 2 divisors, whose sum is σ = 31486230. Its totient is φ = 31486228.

The previous prime is 31486201. The next prime is 31486253. The reversal of 31486229 is 92268413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 3713329 = 5270^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 31486229 - 2⁸ = 31485973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31486289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15743114 + 15743115.

It is an arithmetic number, because the mean of its divisors is an integer number (15743115).

Almost surely, 2^31486229 is an apocalyptic number.

It is an amenable number.

31486229 is a deficient number, since it is larger than the sum of its proper divisors (1).

31486229 is an equidigital number, since it uses as much as digits as its factorization.

31486229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 31486229 is about 5611.2591278607. The cubic root of 31486229 is about 315.7719506412.

The spelling of 31486229 in words is "thirty-one million, four hundred eighty-six thousand, two hundred twenty-nine".