538210945 has 4 divisors (see below), whose sum is σ = 645853140. Its totient is φ = 430568752.

The previous prime is 538210931. The next prime is 538210957. The reversal of 538210945 is 549012835.

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 404854641 + 133356304 = 20121^2 + 11548^2 .

It is a cyclic number.

It is not a de Polignac number, because 538210945 - 2⁷ = 538210817 is a prime.

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, 53821090 + ... + 53821099.

It is an arithmetic number, because the mean of its divisors is an integer number (161463285).

Almost surely, 2^538210945 is an apocalyptic number.

It is an amenable number.

538210945 is a deficient number, since it is larger than the sum of its proper divisors (107642195).

538210945 is a wasteful number, since it uses less digits than its factorization.

538210945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107642194.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 538210945 is about 23199.3738062043. The cubic root of 538210945 is about 813.4249858456.

The spelling of 538210945 in words is "five hundred thirty-eight million, two hundred ten thousand, nine hundred forty-five".