515532420 has 288 divisors, whose sum is σ = 1783192320. Its totient is φ = 119669760.

The previous prime is 515532379. The next prime is 515532427. The reversal of 515532420 is 24235515.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (515532427) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4818007 + ... + 4818113.

It is an arithmetic number, because the mean of its divisors is an integer number (6191640).

Almost surely, 2^515532420 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 515532420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891596160).

515532420 is an abundant number, since it is smaller than the sum of its proper divisors (1267659900).

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

515532420 is a wasteful number, since it uses less digits than its factorization.

515532420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 515532420 is about 22705.3390197108. The cubic root of 515532420 is about 801.8355871369.

Adding to 515532420 its reverse (24235515), we get a palindrome (539767935).

The spelling of 515532420 in words is "five hundred fifteen million, five hundred thirty-two thousand, four hundred twenty".