21232049 has 2 divisors, whose sum is σ = 21232050. Its totient is φ = 21232048.

The previous prime is 21232033. The next prime is 21232073. The reversal of 21232049 is 94023212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 937024 = 4505^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232049 - 2⁴ = 21232033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21232249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616024 + 10616025.

It is an arithmetic number, because the mean of its divisors is an integer number (10616025).

Almost surely, 2^21232049 is an apocalyptic number.

It is an amenable number.

21232049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232049 is an equidigital number, since it uses as much as digits as its factorization.

21232049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21232049 is about 4607.8247579525. The cubic root of 21232049 is about 276.9048968221.

The spelling of 21232049 in words is "twenty-one million, two hundred thirty-two thousand, forty-nine".