521542346 has 8 divisors (see below), whose sum is σ = 842491524. Its totient is φ = 240711840.

The previous prime is 521542297. The next prime is 521542349. The reversal of 521542346 is 643245125.

It can be written as a sum of positive squares in 2 ways, for example, as 436183225 + 85359121 = 20885^2 + 9239^2 .

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

It is not an unprimeable number, because it can be changed into a prime (521542349) 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, 10029635 + ... + 10029686.

Almost surely, 2^521542346 is an apocalyptic number.

521542346 is a deficient number, since it is larger than the sum of its proper divisors (320949178).

521542346 is a wasteful number, since it uses less digits than its factorization.

521542346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20059336.

The product of its digits is 28800, while the sum is 32.

The square root of 521542346 is about 22837.3016357012. The cubic root of 521542346 is about 804.9394118719.

The spelling of 521542346 in words is "five hundred twenty-one million, five hundred forty-two thousand, three hundred forty-six".