210421151 has 2 divisors, whose sum is σ = 210421152. Its totient is φ = 210421150.

The previous prime is 210421073. The next prime is 210421163. The reversal of 210421151 is 151124012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210421151 - 2¹⁸ = 210159007 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 (210421051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105210575 + 105210576.

It is an arithmetic number, because the mean of its divisors is an integer number (105210576).

Almost surely, 2^210421151 is an apocalyptic number.

210421151 is a deficient number, since it is larger than the sum of its proper divisors (1).

210421151 is an equidigital number, since it uses as much as digits as its factorization.

210421151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 210421151 is about 14505.9005580488. The cubic root of 210421151 is about 594.7892773563.

Adding to 210421151 its reverse (151124012), we get a palindrome (361545163).

The spelling of 210421151 in words is "two hundred ten million, four hundred twenty-one thousand, one hundred fifty-one".