210900071 has 2 divisors, whose sum is σ = 210900072. Its totient is φ = 210900070.

The previous prime is 210900013. The next prime is 210900077. The reversal of 210900071 is 170009012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210900071 - 2²² = 206705767 is a prime.

It is a Sophie Germain 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 (210900077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105450035 + 105450036.

It is an arithmetic number, because the mean of its divisors is an integer number (105450036).

Almost surely, 2^210900071 is an apocalyptic number.

210900071 is a deficient number, since it is larger than the sum of its proper divisors (1).

210900071 is an equidigital number, since it uses as much as digits as its factorization.

210900071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 210900071 is about 14522.3989409464. The cubic root of 210900071 is about 595.2401836149.

Adding to 210900071 its reverse (170009012), we get a palindrome (380909083).

The spelling of 210900071 in words is "two hundred ten million, nine hundred thousand, seventy-one".