424315521 has 24 divisors (see below), whose sum is σ = 703148160. Its totient is φ = 241534656.

The previous prime is 424315511. The next prime is 424315537. The reversal of 424315521 is 125513424.

It is not a de Polignac number, because 424315521 - 2¹³ = 424307329 is a prime.

It is a super-2 number, since 2×424315521² = 360087322723002882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (424315511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3765 + ... + 29373.

It is an arithmetic number, because the mean of its divisors is an integer number (29297840).

Almost surely, 2^424315521 is an apocalyptic number.

It is an amenable number.

424315521 is a deficient number, since it is larger than the sum of its proper divisors (278832639).

424315521 is a wasteful number, since it uses less digits than its factorization.

424315521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25885 (or 25882 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 424315521 is about 20598.9203843308. The cubic root of 424315521 is about 751.4434548021.

Adding to 424315521 its reverse (125513424), we get a palindrome (549828945).

The spelling of 424315521 in words is "four hundred twenty-four million, three hundred fifteen thousand, five hundred twenty-one".