515109740 has 12 divisors (see below), whose sum is σ = 1081730496. Its totient is φ = 206043888.

The previous prime is 515109739. The next prime is 515109743. The reversal of 515109740 is 47901515.

It is a junction number, because it is equal to n+sod(n) for n = 515109697 and 515109706.

It is not an unprimeable number, because it can be changed into a prime (515109743) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12877724 + ... + 12877763.

It is an arithmetic number, because the mean of its divisors is an integer number (90144208).

Almost surely, 2^515109740 is an apocalyptic number.

It is an amenable number.

515109740 is an abundant number, since it is smaller than the sum of its proper divisors (566620756).

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

515109740 is a wasteful number, since it uses less digits than its factorization.

515109740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25755496 (or 25755494 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 515109740 is about 22696.0291681166. The cubic root of 515109740 is about 801.6163881621.

Subtracting from 515109740 its reverse (47901515), we obtain a square (467208225 = 21615²).

The spelling of 515109740 in words is "five hundred fifteen million, one hundred nine thousand, seven hundred forty".