521354197 has 8 divisors (see below), whose sum is σ = 641666816. Its totient is φ = 412499952.

The previous prime is 521354159. The next prime is 521354201. The reversal of 521354197 is 791453125.

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

It is a cyclic number.

It is not a de Polignac number, because 521354197 - 2⁷ = 521354069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521354117) 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, 2864493 + ... + 2864674.

It is an arithmetic number, because the mean of its divisors is an integer number (80208352).

Almost surely, 2^521354197 is an apocalyptic number.

It is an amenable number.

521354197 is a deficient number, since it is larger than the sum of its proper divisors (120312619).

521354197 is a wasteful number, since it uses less digits than its factorization.

521354197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729187.

The product of its digits is 37800, while the sum is 37.

The square root of 521354197 is about 22833.1819289384. The cubic root of 521354197 is about 804.8426049286.

The spelling of 521354197 in words is "five hundred twenty-one million, three hundred fifty-four thousand, one hundred ninety-seven".