210214505 has 4 divisors (see below), whose sum is σ = 252257412. Its totient is φ = 168171600.

The previous prime is 210214493. The next prime is 210214507. The reversal of 210214505 is 505412012.

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 115949824 + 94264681 = 10768^2 + 9709^2 .

It is not a de Polignac number, because 210214505 - 2¹⁸ = 209952361 is a prime.

It is a super-2 number, since 2×210214505² = 88380276224790050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210214507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21021446 + ... + 21021455.

It is an arithmetic number, because the mean of its divisors is an integer number (63064353).

Almost surely, 2^210214505 is an apocalyptic number.

It is an amenable number.

210214505 is a deficient number, since it is larger than the sum of its proper divisors (42042907).

210214505 is an equidigital number, since it uses as much as digits as its factorization.

210214505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42042906.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 210214505 is about 14498.7759828201. The cubic root of 210214505 is about 594.5945075155.

Adding to 210214505 its reverse (505412012), we get a palindrome (715626517).

The spelling of 210214505 in words is "two hundred ten million, two hundred fourteen thousand, five hundred five".