210342545 has 24 divisors (see below), whose sum is σ = 294490728. Its totient is φ = 143808000.

The previous prime is 210342529. The next prime is 210342551. The reversal of 210342545 is 545243012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 138956944 + 71385601 = 11788^2 + 8449^2 .

It is not a de Polignac number, because 210342545 - 2⁴ = 210342529 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97175 + ... + 99315.

It is an arithmetic number, because the mean of its divisors is an integer number (12270447).

Almost surely, 2^210342545 is an apocalyptic number.

It is an amenable number.

210342545 is a deficient number, since it is larger than the sum of its proper divisors (84148183).

210342545 is a wasteful number, since it uses less digits than its factorization.

210342545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 210342545 is about 14503.1908558082. The cubic root of 210342545 is about 594.7152039582.

Adding to 210342545 its reverse (545243012), we get a palindrome (755585557).

The spelling of 210342545 in words is "two hundred ten million, three hundred forty-two thousand, five hundred forty-five".