515215380 has 48 divisors (see below), whose sum is σ = 1481598720. Its totient is φ = 133676928.

The previous prime is 515215357. The next prime is 515215397. The reversal of 515215380 is 83512515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 113820 + ... + 118259.

It is an arithmetic number, because the mean of its divisors is an integer number (30866640).

Almost surely, 2^515215380 is an apocalyptic number.

It is an amenable number.

515215380 is an abundant number, since it is smaller than the sum of its proper divisors (966383340).

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

515215380 is a wasteful number, since it uses less digits than its factorization.

515215380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232128 (or 232126 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 515215380 is about 22698.3563281573. The cubic root of 515215380 is about 801.6711835842.

Adding to 515215380 its reverse (83512515), we get a palindrome (598727895).

The spelling of 515215380 in words is "five hundred fifteen million, two hundred fifteen thousand, three hundred eighty".