515424420 has 144 divisors (see below), whose sum is σ = 1801433088. Its totient is φ = 116847360.

The previous prime is 515424409. The next prime is 515424493. The reversal of 515424420 is 24424515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158410 + ... + 161630.

It is an arithmetic number, because the mean of its divisors is an integer number (12509952).

Almost surely, 2^515424420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515424420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900716544).

515424420 is an abundant number, since it is smaller than the sum of its proper divisors (1286008668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515424420 is a wasteful number, since it uses less digits than its factorization.

515424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370 (or 3365 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 515424420 is about 22702.9605998865. The cubic root of 515424420 is about 801.7795904702.

Adding to 515424420 its reverse (24424515), we get a palindrome (539848935).

The spelling of 515424420 in words is "five hundred fifteen million, four hundred twenty-four thousand, four hundred twenty".