31322429 has 2 divisors, whose sum is σ = 31322430. Its totient is φ = 31322428.

The previous prime is 31322371. The next prime is 31322437. The reversal of 31322429 is 92422313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24552025 + 6770404 = 4955^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322429 - 2²⁰ = 30273853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31322398 and 31322407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31322479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661214 + 15661215.

It is an arithmetic number, because the mean of its divisors is an integer number (15661215).

Almost surely, 2^31322429 is an apocalyptic number.

It is an amenable number.

31322429 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322429 is an equidigital number, since it uses as much as digits as its factorization.

31322429 is an odious number, because the sum of its binary digits is odd.

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

The square root of 31322429 is about 5596.6444410915. The cubic root of 31322429 is about 315.2234209033.

The spelling of 31322429 in words is "thirty-one million, three hundred twenty-two thousand, four hundred twenty-nine".