521313545 has 8 divisors (see below), whose sum is σ = 658501440. Its totient is φ = 395100720.

The previous prime is 521313521. The next prime is 521313547. The reversal of 521313545 is 545313125.

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

It is not a de Polignac number, because 521313545 - 2¹² = 521309449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521313547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2743661 + ... + 2743850.

It is an arithmetic number, because the mean of its divisors is an integer number (82312680).

Almost surely, 2^521313545 is an apocalyptic number.

It is an amenable number.

521313545 is a deficient number, since it is larger than the sum of its proper divisors (137187895).

521313545 is a wasteful number, since it uses less digits than its factorization.

521313545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487535.

The product of its digits is 9000, while the sum is 29.

The square root of 521313545 is about 22832.2917159010. The cubic root of 521313545 is about 804.8216854896.

The spelling of 521313545 in words is "five hundred twenty-one million, three hundred thirteen thousand, five hundred forty-five".