210840151 has 2 divisors, whose sum is σ = 210840152. Its totient is φ = 210840150.

The previous prime is 210840139. The next prime is 210840173. The reversal of 210840151 is 151048012.

It is an a-pointer prime, because the next prime (210840173) can be obtained adding 210840151 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210840151 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 (210840181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105420075 + 105420076.

It is an arithmetic number, because the mean of its divisors is an integer number (105420076).

Almost surely, 2^210840151 is an apocalyptic number.

210840151 is a deficient number, since it is larger than the sum of its proper divisors (1).

210840151 is an equidigital number, since it uses as much as digits as its factorization.

210840151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 210840151 is about 14520.3357743545. The cubic root of 210840151 is about 595.1838059348.

Adding to 210840151 its reverse (151048012), we get a palindrome (361888163).

The spelling of 210840151 in words is "two hundred ten million, eight hundred forty thousand, one hundred fifty-one".