21950141 has 2 divisors, whose sum is σ = 21950142. Its totient is φ = 21950140.

The previous prime is 21950107. The next prime is 21950161. The reversal of 21950141 is 14105912.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 1110916 = 4565^2 + 1054^2 .

It is a cyclic number.

It is not a de Polignac number, because 21950141 - 2¹⁸ = 21687997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21950101) 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, 10975070 + 10975071.

It is an arithmetic number, because the mean of its divisors is an integer number (10975071).

Almost surely, 2^21950141 is an apocalyptic number.

It is an amenable number.

21950141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21950141 is an equidigital number, since it uses as much as digits as its factorization.

21950141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 21950141 is about 4685.0977577848. The cubic root of 21950141 is about 279.9920958653.

The spelling of 21950141 in words is "twenty-one million, nine hundred fifty thousand, one hundred forty-one".