521042331 has 8 divisors (see below), whose sum is σ = 695731264. Its totient is φ = 346857480.

The previous prime is 521042303. The next prime is 521042341. The reversal of 521042331 is 133240125.

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

It is not a de Polignac number, because 521042331 - 2¹¹ = 521040283 is a prime.

It is a super-2 number, since 2×521042331² = 542970221387827122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521042298 and 521042307.

It is not an unprimeable number, because it can be changed into a prime (521042341) 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, 123601 + ... + 127746.

It is an arithmetic number, because the mean of its divisors is an integer number (86966408).

Almost surely, 2^521042331 is an apocalyptic number.

521042331 is a deficient number, since it is larger than the sum of its proper divisors (174688933).

521042331 is a wasteful number, since it uses less digits than its factorization.

521042331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252041.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 521042331 is about 22826.3516795830. The cubic root of 521042331 is about 804.6820914616.

Adding to 521042331 its reverse (133240125), we get a palindrome (654282456).

The spelling of 521042331 in words is "five hundred twenty-one million, forty-two thousand, three hundred thirty-one".