40320229 has 2 divisors, whose sum is σ = 40320230. Its totient is φ = 40320228.

The previous prime is 40320221. The next prime is 40320233. The reversal of 40320229 is 92202304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 14615329 = 5070^2 + 3823^2 .

It is a cyclic number.

It is not a de Polignac number, because 40320229 - 2³ = 40320221 is a prime.

It is a super-2 number, since 2×40320229² = 3251441733224882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40320221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160114 + 20160115.

It is an arithmetic number, because the mean of its divisors is an integer number (20160115).

Almost surely, 2^40320229 is an apocalyptic number.

It is an amenable number.

40320229 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320229 is an equidigital number, since it uses as much as digits as its factorization.

40320229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40320229 is about 6349.8211785845. The cubic root of 40320229 is about 342.9054044744.

The spelling of 40320229 in words is "forty million, three hundred twenty thousand, two hundred twenty-nine".