521342505 has 48 divisors (see below), whose sum is σ = 924618240. Its totient is φ = 271678464.

The previous prime is 521342489. The next prime is 521342551. The reversal of 521342505 is 505243125.

It is a happy number.

It is not a de Polignac number, because 521342505 - 2⁴ = 521342489 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 361576 + ... + 363014.

It is an arithmetic number, because the mean of its divisors is an integer number (19262880).

Almost surely, 2^521342505 is an apocalyptic number.

It is an amenable number.

521342505 is a deficient number, since it is larger than the sum of its proper divisors (403275735).

521342505 is a wasteful number, since it uses less digits than its factorization.

521342505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 521342505 is about 22832.9258966082. The cubic root of 521342505 is about 804.8365883599.

The spelling of 521342505 in words is "five hundred twenty-one million, three hundred forty-two thousand, five hundred five".