210454030505 has 4 divisors (see below), whose sum is σ = 252544836612. Its totient is φ = 168363224400.

The previous prime is 210454030471. The next prime is 210454030531. The reversal of 210454030505 is 505030454012.

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 72260428969 + 138193601536 = 268813^2 + 371744^2 .

It is not a de Polignac number, because 210454030505 - 2¹⁶ = 210453964969 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 21045403046 + ... + 21045403055.

It is an arithmetic number, because the mean of its divisors is an integer number (63136209153).

Almost surely, 2^210454030505 is an apocalyptic number.

It is an amenable number.

210454030505 is a deficient number, since it is larger than the sum of its proper divisors (42090806107).

210454030505 is an equidigital number, since it uses as much as digits as its factorization.

210454030505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42090806106.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 210454030505 its reverse (505030454012), we get a palindrome (715484484517).

The spelling of 210454030505 in words is "two hundred ten billion, four hundred fifty-four million, thirty thousand, five hundred five".