29148221 has 2 divisors, whose sum is σ = 29148222. Its totient is φ = 29148220.

The previous prime is 29148187. The next prime is 29148233. The reversal of 29148221 is 12284192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23145721 + 6002500 = 4811^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 29148221 - 2²² = 24953917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29148271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14574110 + 14574111.

It is an arithmetic number, because the mean of its divisors is an integer number (14574111).

Almost surely, 2^29148221 is an apocalyptic number.

It is an amenable number.

29148221 is a deficient number, since it is larger than the sum of its proper divisors (1).

29148221 is an equidigital number, since it uses as much as digits as its factorization.

29148221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 29148221 is about 5398.9092416895. The cubic root of 29148221 is about 307.7542207735.

The spelling of 29148221 in words is "twenty-nine million, one hundred forty-eight thousand, two hundred twenty-one".