521983201 has 4 divisors (see below), whose sum is σ = 523968192. Its totient is φ = 519998212.

The previous prime is 521983193. The next prime is 521983223. The reversal of 521983201 is 102389125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521983201 - 2³ = 521983193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521983271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992101 + ... + 992626.

It is an arithmetic number, because the mean of its divisors is an integer number (130992048).

Almost surely, 2^521983201 is an apocalyptic number.

It is an amenable number.

521983201 is a deficient number, since it is larger than the sum of its proper divisors (1984991).

521983201 is a wasteful number, since it uses less digits than its factorization.

521983201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984990.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 521983201 is about 22846.9516785063. The cubic root of 521983201 is about 805.1661506510.

The spelling of 521983201 in words is "five hundred twenty-one million, nine hundred eighty-three thousand, two hundred one".