210700145 has 4 divisors (see below), whose sum is σ = 252840180. Its totient is φ = 168560112.

The previous prime is 210700121. The next prime is 210700153. The reversal of 210700145 is 541007012.

210700145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57138481 + 153561664 = 7559^2 + 12392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210700145 is a prime.

It is a super-2 number, since 2×210700145² = 88789102206042050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21070010 + ... + 21070019.

It is an arithmetic number, because the mean of its divisors is an integer number (63210045).

Almost surely, 2^210700145 is an apocalyptic number.

It is an amenable number.

210700145 is a deficient number, since it is larger than the sum of its proper divisors (42140035).

210700145 is an equidigital number, since it uses as much as digits as its factorization.

210700145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42140034.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 210700145 is about 14515.5139419863. The cubic root of 210700145 is about 595.0520350886.

Adding to 210700145 its reverse (541007012), we get a palindrome (751707157).

The spelling of 210700145 in words is "two hundred ten million, seven hundred thousand, one hundred forty-five".