521055245 has 8 divisors (see below), whose sum is σ = 625718520. Its totient is φ = 416542720.

The previous prime is 521055193. The next prime is 521055277. The reversal of 521055245 is 542550125.

It can be written as a sum of positive squares in 4 ways, for example, as 27237961 + 493817284 = 5219^2 + 22222^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521055245 - 2¹⁸ = 520793101 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29936 + ... + 44025.

It is an arithmetic number, because the mean of its divisors is an integer number (78214815).

Almost surely, 2^521055245 is an apocalyptic number.

It is an amenable number.

521055245 is a deficient number, since it is larger than the sum of its proper divisors (104663275).

521055245 is a wasteful number, since it uses less digits than its factorization.

521055245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75375.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 521055245 is about 22826.6345526449. The cubic root of 521055245 is about 804.6887394043.

The spelling of 521055245 in words is "five hundred twenty-one million, fifty-five thousand, two hundred forty-five".