521142357 has 8 divisors (see below), whose sum is σ = 696470400. Its totient is φ = 346621280.

The previous prime is 521142353. The next prime is 521142379. The reversal of 521142357 is 753241125.

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 521142357 - 2² = 521142353 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521142353) 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, 200232 + ... + 202817.

It is an arithmetic number, because the mean of its divisors is an integer number (87058800).

Almost surely, 2^521142357 is an apocalyptic number.

It is an amenable number.

521142357 is a deficient number, since it is larger than the sum of its proper divisors (175328043).

521142357 is a wasteful number, since it uses less digits than its factorization.

521142357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403483.

The product of its digits is 8400, while the sum is 30.

The square root of 521142357 is about 22828.5425947431. The cubic root of 521142357 is about 804.7335805480.

The spelling of 521142357 in words is "five hundred twenty-one million, one hundred forty-two thousand, three hundred fifty-seven".