521000422 has 4 divisors (see below), whose sum is σ = 781500636. Its totient is φ = 260500210.

The previous prime is 521000401. The next prime is 521000461. The reversal of 521000422 is 224000125.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 521000396 and 521000405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130250104 + ... + 130250107.

It is an arithmetic number, because the mean of its divisors is an integer number (195375159).

Almost surely, 2^521000422 is an apocalyptic number.

521000422 is a deficient number, since it is larger than the sum of its proper divisors (260500214).

521000422 is a wasteful number, since it uses less digits than its factorization.

521000422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260500213.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 521000422 is about 22825.4336651026. The cubic root of 521000422 is about 804.6605165504.

Adding to 521000422 its reverse (224000125), we get a palindrome (745000547).

The spelling of 521000422 in words is "five hundred twenty-one million, four hundred twenty-two", and thus it is an aban number.