47221429 has 2 divisors, whose sum is σ = 47221430. Its totient is φ = 47221428.

The previous prime is 47221409. The next prime is 47221459. The reversal of 47221429 is 92412274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 22071204 = 5015^2 + 4698^2 .

It is a cyclic number.

It is not a de Polignac number, because 47221429 - 2⁵ = 47221397 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 47221429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47221409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23610714 + 23610715.

It is an arithmetic number, because the mean of its divisors is an integer number (23610715).

Almost surely, 2^47221429 is an apocalyptic number.

It is an amenable number.

47221429 is a deficient number, since it is larger than the sum of its proper divisors (1).

47221429 is an equidigital number, since it uses as much as digits as its factorization.

47221429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 47221429 is about 6871.7849937262. The cubic root of 47221429 is about 361.4484570245.

The spelling of 47221429 in words is "forty-seven million, two hundred twenty-one thousand, four hundred twenty-nine".