31914229 has 2 divisors, whose sum is σ = 31914230. Its totient is φ = 31914228.

The previous prime is 31914209. The next prime is 31914263. The reversal of 31914229 is 92241913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25654225 + 6260004 = 5065^2 + 2502^2 .

It is an emirp because it is prime and its reverse (92241913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31914229 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31914229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31914209) 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, 15957114 + 15957115.

It is an arithmetic number, because the mean of its divisors is an integer number (15957115).

Almost surely, 2^31914229 is an apocalyptic number.

It is an amenable number.

31914229 is a deficient number, since it is larger than the sum of its proper divisors (1).

31914229 is an equidigital number, since it uses as much as digits as its factorization.

31914229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 31914229 is about 5649.2680056800. The cubic root of 31914229 is about 317.1963045547.

The spelling of 31914229 in words is "thirty-one million, nine hundred fourteen thousand, two hundred twenty-nine".