29540221 has 2 divisors, whose sum is σ = 29540222. Its totient is φ = 29540220.

The previous prime is 29540219. The next prime is 29540227. The reversal of 29540221 is 12204592.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 7214596 = 4725^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 29540221 - 2¹ = 29540219 is a prime.

Together with 29540219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29540227) 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, 14770110 + 14770111.

It is an arithmetic number, because the mean of its divisors is an integer number (14770111).

Almost surely, 2^29540221 is an apocalyptic number.

It is an amenable number.

29540221 is a deficient number, since it is larger than the sum of its proper divisors (1).

29540221 is an equidigital number, since it uses as much as digits as its factorization.

29540221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 29540221 is about 5435.0916275625. The cubic root of 29540221 is about 309.1276934071.

The spelling of 29540221 in words is "twenty-nine million, five hundred forty thousand, two hundred twenty-one".