521214505 has 32 divisors (see below), whose sum is σ = 726994944. Its totient is φ = 351366336.

The previous prime is 521214493. The next prime is 521214553. The reversal of 521214505 is 505412125.

It is a cyclic number.

It is not a de Polignac number, because 521214505 - 2¹³ = 521206313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521214505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 587172 + ... + 588058.

It is an arithmetic number, because the mean of its divisors is an integer number (22718592).

Almost surely, 2^521214505 is an apocalyptic number.

It is an amenable number.

521214505 is a deficient number, since it is larger than the sum of its proper divisors (205780439).

521214505 is a wasteful number, since it uses less digits than its factorization.

521214505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 521214505 is about 22830.1227548167. The cubic root of 521214505 is about 804.7707151482.

The spelling of 521214505 in words is "five hundred twenty-one million, two hundred fourteen thousand, five hundred five".