515063540 has 24 divisors (see below), whose sum is σ = 1102043880. Its totient is φ = 202137728.

The previous prime is 515063491. The next prime is 515063561. The reversal of 515063540 is 45360515.

It can be written as a sum of positive squares in 4 ways, for example, as 272514064 + 242549476 = 16508^2 + 15574^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241895 + ... + 244014.

It is an arithmetic number, because the mean of its divisors is an integer number (45918495).

Almost surely, 2^515063540 is an apocalyptic number.

It is an amenable number.

515063540 is an abundant number, since it is smaller than the sum of its proper divisors (586980340).

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

515063540 is a wasteful number, since it uses less digits than its factorization.

515063540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485971 (or 485969 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 515063540 is about 22695.0113461086. The cubic root of 515063540 is about 801.5924218875.

The spelling of 515063540 in words is "five hundred fifteen million, sixty-three thousand, five hundred forty".